Answers
The target selling price per pair of boots is; $754
How to find the target selling price?The computation of target selling price per pair of shoes is shown below:-
Return on investment = $1,400,000 × 30%
= $420,000
Total variable cost = Variable manufacturing costs + Variable selling and administrative costs
= $36,000 + $18,000
= $54,000
Variable cost per unit = Total variable cost ÷ Planned production and sales
= $54,000 ÷ 1,000
= $54
Total Fixed cost = Fixed manufacturing costs + Fixed selling and administrative costs
= $120,000 + $80,000
= $200,000
Target profit = Total Contribution - Fixed cost
Total Contribution = Return on investment + Total Fixed cost
= $420,000 + $280,000
= $700,000
Contribution per unit = Total Contribution ÷Planned production and sales
= $700,000 ÷ 1000
= $700
Selling price per unit = Contribution per unit + Variable cost per unit
= $700 + $54
= $754
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Related Questions
Use the given conditions to find the values of all six trigonometric functions. (If an answer is undefined, enter UNDEFINED.) sec(x) = − 9/5, tan(x) < 0
sin(x)=
cos(x)=
tan(x)=
csc(x)=
sec(x)=
cot(x)=
Answers
Answer:
Step-by-step explanation
sec x = -9/5.
cos x = 1/ secx
So, here
cos x = 1 / -9/5
= -5/9
sin x = √(1 - cos^2 x)
= √(1 - 25/81)
= √(56/81)
= √56/9
tan x = sinx / cos x
= √56/9 / -5/9
= -√56/5
cosec x = 1 / sin x
= 1 / √56/9
= 9/√56.
cot x = 1/tanx
= 1/-√56/5
= -5/√56
g a popluation of squirrels lives in a firest with a carrying capacity of 1800. assume logisitic growth with growth constant k
Answers
The doubling time is approximately 83 years. This means that it will take approximately 83 years for the squirrel population to double from its initial size of 450 squirrels.
What is an exponential function?
An exponential function is a function in which the variable appears in the exponent. Exponential functions have the form y = ab^x, where a and b are constants and x is the variable. The constant b is called the base of the exponential function.
The given information states that the squirrel population P(t) follows a logistic growth model with a growth constant k = 0.8 yr-1 and a carrying capacity of 1800 squirrels. The formula for the squirrel population P(t) can be found using the logistic growth model:
P(t) = K / (1 + (K/P0 - 1) * e^(-kt))
where P0 is the initial population of squirrels, K is the carrying capacity, and t is time in years.
Substituting the given values into the formula, we get:
P(t) = 1800 / (1 + (1800/450 - 1) * e^(-0.8t))
Simplifying the equation, we get:
P(t) = 1800 / (1 + 3e^(-0.8t))
This is the formula for the squirrel population P(t).
To find the doubling time (the time it takes for the squirrel population to double), we need to find the time t at which the squirrel population reaches twice the initial population of 450 squirrels. This can be represented by the equation:
2 * 450 = 1800 / (1 + 3e^(-0.8t))
Solving for t, we get:
0.8t = ln(3)
t = ln(3) / 0.8
Hence, the doubling time is approximately 83 years. This means that it will take approximately 83 years for the squirrel population to double from its initial size of 450 squirrels.
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the hamden board of education wants to know how the community feels about building a new media center for the middle school. they called every tenth person on the registration list of 7,300 voters until they had called a total of 40 voters. which of the following are true of the sample of 40 voters? check all that apply.
the hamden board of education wants to know how the community feels about building a new media center for the middle school. they called every tenth person on the registration list of 7,300 voters until they had called a total of 40 voters. which of the following are true of the sample of 40 voters? check all that apply.
Answers
According to the statement above, The Hamden board of education called every tenth person on the registration list. The sample is not randomly chosen (FALSE)
Given that the statement doesn't tell us anything about the way they choose the sample, it is reasonable to conclude that this is a randomly chosen. They called every tenth person on the registration list until the number of people was 40.
The sample should be larger to give more reliable information (TRUE)
We did not have to use mathematics to determine that you would need more information to get a conclusion. You must increase the sample, that is, the sample must be larger to give a reliable information.
The sample size is too large to make inferences (False)
This is explained in the previous item. If the sample should be lager is because the size is not too large.
The sample size is too small to represent the population (TRUE
This is true because 40 voters represent barely 0.5% of the entire list. This list has 7300 voters, so getting the conclusion from this sample doesn't provide with a strong conclusion.
The sample size is too small and will show larger variation. (FALSE)
Although the sample size is too small, the sample size not necessarily will show variation. In fact, it is possible that it does not show any variation and most of the people feel well about building a new media center for the middle school but it doesn't mean that the whole community does.
The sample is invalid because it randomly chooses voters. (FALSE)
It is false because in probability studies the sample is chosen randomly, so you get conclusions about the whole population always taking samples that represent the population as a whole.
The sample size is too small and can lead to false inferences (TRUE)
We can get false conclusions given that the sample size is too small. It's important to note that the sample size supports the conclusion of the study, so the sample must increase to have a reliable study.
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Your iron works has contracted to design and build a 500-ft^3, square-based, open-top, rectangular steel holding tank for a paper company. The tank is made by welding thin stainless steel plates together along their edges. As the production engineer, your job is to find dimensions for the base and height that will make the tank weigh as little as possible. How will you take weight into account?
What dimensions do you tell the shop to use?
Answers
The dimensions we will tell the shop to use are ⇒ Volume = 10 x 10 x 5 foot
The surface area of the box = [tex]225[/tex] [tex]ft^{2}[/tex]
Weight of the metal = 1125 kg
According to the question,
Given value = [tex]500[/tex] [tex]ft^{3}[/tex] tanks is to be built which has to be a square-based rectangle steel holding tank.
For this, we have to know the total surface area of the box,
Surface area (A) = 4 x sides of the rectangle + square base -- equation 1
Let's take the width of the square base = p
And let height = h
Since we know that,
Rectangle sides = p x h
Square base ⇒ p x p = [tex]p^{2}[/tex]
Substituting these values in equation 1,
Surface area ( A ) = 4 x ( p x h ) + [tex]p^{2}[/tex] ---- equation 2
The formula for calculating the volume of the box,
V = p x p x h
V = [tex]p^{2}[/tex] x h --- equation 3
Referring to the question that the value of the volume is already given such that volume = [tex]500[/tex] [tex]ft^{3}[/tex]
So, V = [tex]500[/tex] [tex]ft^{3}[/tex]
Putting the value of V in equation 3,
500 = [tex]p^{2}[/tex] x h
h = [tex]\frac{500}{p^{2} }[/tex] ---- equation 4
Substituting the value of h from equation 4 to equation 2,
A = 4 x ( p x [tex]\frac{500}{p^{2} }[/tex] ) + [tex]p^{2}[/tex]
⇒ A = [tex]\frac{2000}{P}[/tex] + [tex]p^{2}[/tex]
We will be taking the derivative of the above equation,
⇒ A' = - [tex]\frac{2000}{p^{2} }[/tex] + 2p
Now we will be minimizing A,
⇒ 0 = - [tex]\frac{2000}{p^{2} }[/tex] + 2[tex]p[/tex]
⇒ [tex]\frac{2000}{p^{2} }[/tex] = 2[tex]p[/tex]
⇒ 2000 = 2[tex]p^{3}[/tex]
⇒ 1000 = [tex]p^{3}[/tex]
⇒ p = [tex]\sqrt[3]{1000}[/tex]
⇒ p = 10 foot
Substituting the value of p in equation 4,
⇒ h = [tex]\frac{500}{10^{2} }[/tex]
⇒ h = [tex]\frac{500}{100}[/tex]
⇒ h = 5 foot
Substituting values in the area of the square box,
A = 4 x (10 x 5) + [tex]5^{2}[/tex]
A = 200 + 25
A = 225 [tex]ft^{2}[/tex]
The weight of the metal,
⇒ weight = A x weight per square foot
⇒ weight = 225 x 5
⇒ weight = 1125 kg
Therefore, The dimensions we will tell the shop to use are ⇒ Volume = 10 x 10 x 5 feet
The surface area of the box = 225 [tex]ft^{2}[/tex]
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A student is assessing the correlation between the number of workers in a factory and the number of units produced daily. The table shows the data:
Number of workers
0 10 20 30 40 50 60 70 80 90
Number of units 2 52 102 152 202 252 302 352 402 452
(
Part A: Is there any correlation between the number of workers in a factory and the number of units produced daily? Justify your answer. (4 points)
Part B: Write a function that best fits the data. (3 points)
Part C: What do the slope and y-intercept of the plot indicate? (3 points)
Answers
Answer: Part A: Yes there is. As the number of workers increases, so does the production.
Part B: y = 5x + 2
Part C: The slope indicates that for every person there is 5 units being produced, and the y-intercept indicates that 2 units are being made every day, regardless of if there are no workers ( this, however is unrealistic but it is how the data is )
Step-by-step explanation:
a survey was conducted with a large group of teenagers from 6 different states and it asked them for their favourite sport out of a large list of sports. the study aims to look at whether a teenager's state of residence is associated with their sporting preferences. assume that p is the proportion of teenagers who selected the sport most preferred in their state of residence, such that p1 is that for state 1, p2 is that for state 2 and so on. select from the following all statements that are true as well as the hypothesis that corresponds to this study:
Answers
H0: There is no link between state and preferred sport.
H1: There is a connection between state and preferred sport.
Given,
The question to be answered is whether the factor "state" and the factor "sporting choice" are related.
Therefore, the focus of the study is on "association" and whether or not state-to-state variations in athletic preference distributions exist. The most appropriate test in this instance is the test for association.
Unless there is evidence to the contrary, two things are assumed to not be related. Since the null hypothesis is assumed to be true, the following two hypotheses are the proper pair:
H0: There is no connection between a person's state and their preferred sport.
H1: The choice for sports and state are related.
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omplete the proof to show that abcd is a parallelogram. on a coordinate plane, quadrilateral a b c d is shown. point a is at (negative 2, negative 2), point b is at (negative 3, 4), point c is at (2, 2), and point d is at (3, negative 4). the slope of line segment b c is startfraction 4 minus 2 over negative 3 minus 2 endfraction
Answers
The quadrilateral abcd is a parallelogram because the slopes of opposite sides are equal.
In the given figure we have a quadrilateral ABCD with A (-2,-2) , B(-3,4), C(2,2)
and D(3,-4).
We know that when the slope of two lines are equal then they are parallel.
In the given figure, Slope of BC= Slope of AD =
⇒ BC and AD are parallel .
Also, Slope of CD= Slope of BA =-6
⇒ CD and BA are parallel .
ABCD is a parallelogram because both pairs of opposite sides are parallel.
Hence, the correct reason for the given space is "slopes of opposite sides are equal"
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consider the initial value problem find the eigenvalue , an eigenvector , and a generalized eigenvector for the coefficient matrix of this linear system. -4 , 1 0 , c 0 find the most general real-valued solution to the linear system of differential equations. use as the independent variable in your answers.
Answers
The eigenvalue for this coefficient matrix is c, the eigenvector is (1, 0) and the generalized eigenvector is (1, -4).The most general real-valued solution to the linear system of differential equations is given by:y(x) = c1e^(-4x) + c2xe^(-4x),
To find the eigenvalue, we need to solve the characteristic equation of the coefficient matrix, which is given by det(A - cI) = 0. In this case, the characteristic equation is -c^2 + 4c = 0, which has a single solution of c = 4. Thus, the eigenvalue is c = 4.
To find the eigenvector, we need to solve the linear system (A - cI)v = 0. For this coefficient matrix, the linear system is (A - 4I)v = 0, which has the solution v = (1, 0). Thus, the eigenvector is (1, 0).
To find the generalized eigenvector, we need to solve the linear system (A - cI)w = v, where v is the eigenvector. In this case, the linear system is (A - 4I)w = (1, 0), which has the solution w = (1, -4). Thus, the generalized eigenvector is (1, -4).
Finally, the most general real-valued solution to the linear system of differential equations is given by y(x) = c1e^(-4x) + c2xe^(-4x), where c1 and c2 are arbitrary constants.
Characteristic equation: det(A - cI) = 0
-c2 + 4c = 0
c = 4
Eigenvector: (A - 4I)v = 0
v = (1, 0)
Generalized eigenvector: (A - 4I)w = v
w = (1, -4)
Most general solution: y(x) = c1e^(-4x) + c2xe^(-4x), where c1 and c2 are arbitrary constants.
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Diego knows he will have a minimum of $2000 in his savings from the education award.Diego decides to get a part time job at night and on weekends to save additional money for college.
Inequality and meaning of variables
Graph
Answers
The money left is $5000 - $2000 = $3000 will be earned through an internship.
What is subtraction?To subtract in mathematics is to take something away from a group or a number of objects.
In other meaning, subtraction is a mathematical operation such that two values are going to subtract and give a resultant value.
As per the given,
Money earned in award = $2000
Money had at the end of saving account = $5000
Money earned by internship = $5000 - $2000 = $3000
Hence "$3000 of the remaining $5000 will be earned through an internship".
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Two regular pentagons and a regular decagon, all with the same side length, can completely surround a point, as shown.
Asymptote code below. An equilateral triangle, a regular octagon, and a regular -gon, all with the same side length, also completely surround a point. Find .
Answers
The regular polygon has 20 sides.
The regular pentagon is a regular polygon with five sides
The regular decagon is a regular decagon with ten sides
The angle sum around a point adds to 360 degrees.
Each interior angle of the square is 90 degrees
Each interior angle of the regular pentagon is 108 degrees.
The Interior angle of our unknown polygon is 360 - 108 - 90 = 162 degrees.
A quick calculation shows us that the exterior angle of this polygon is 18 degrees.
The sum of the external angles of any regular polygon is 360 degrees
Divide 360 by 18 and you get 20 times.
Thus our unknown polygon has 20 sides.
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A line passes through the point 6,2 and has a slope of -4 over 3.
Write an equation in slope-intercept form for this line.
Answers
Answer:
y = -4/3x + 10
Step-by-step explanation:
A line with a slope of -4 over 3 that passes through the point (6,2) can be written in slope-intercept form as:
y = (-4/3)x + b
To find the value of b, we can plug in the coordinates of the given point (6,2) into the equation and solve for b:
2 = (-4/3)(6) + b
2 = -8 + b
b = 10
Therefore, the equation of the line in slope-intercept form is:
y = (-4/3)x + 10
I am very confused can someone help with this problem?
Answers
The value of b must be equal to -14, so that the function has at least one inflection point. Hence, option B is correct.
What is an expression?Expressions are mathematical operations that involve at least two terms connected by an operator and can be either integers, variables, or both. The operations with reflection coefficients are addition, subtraction, multiplication, and division.
As per the instruction given in the question,
The given function,
f(x) = x⁴ + bx² + 1
Differentiate with respect to x,
f'(x) = 4x³ + 2xb
Again differentiate with respect to x,
f''(x) = 12x² + 2b
For inflection point, f''(x) = 0
12x² + 2b = 0
2b = -12x²
b = -6x²
x = √-b/6, x ∈ [1, 2]
Let's assume that b = -28
x = √-(-28)/6
x = √28/6
x = √14/3, here x ∉ [1, 2], hence it is incorrect.
If b = -14
x = √-(-14)/6
x = √14/6
x = √7/3 ≈ 1.82, here x ∈ [1, 2], hence it is correct.
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Write a polynomial function of least degree with zeroes
–
1, 5,9
Write your answer using the variable x and in standard form with a leading coefficient of 1
Answers
By multiplying together (x-1) and (x-5) we get x^2 - 5x - 1x + 5, which simplifies to x^2 - 6x + 5.
Now we have to add (x-9). When we multiply that with the polynomial we just got, we get x^3 - 6x^2 + 5x - 9x^2 + 54x - 45, which simplifies to x^3 - 15x^2 + 59x - 45.
So the function is y = x^3 - 15x^2 + 59x - 45
Write 58,000 in scientific notation by filling in the blanks of the structure
Answers
Answer: [tex]5.8\times 10^4[/tex]
Reason:
Place the decimal point between the 5 and the 8. So we have the value 5.8
To get back to 58000, we need to move the decimal point 4 spots to the right. This is why we have 4 as the exponent over 10.
All scientific notation values are of the form [tex]a \times 10^b[/tex]
where [tex]1 \le a < 10[/tex] or [tex]-10 < a \le 1[/tex]
The b value is an integer.
Kaylee wants to find an exact solution to the system shown. Which method would be the most straightforward for her to use?
Answers
The method that would be the most straight forward for her to use would be the substitution method because you can easily solve one equation for a variable. That is option A.
What is substitution method for solving equations?The substitution method for solving equations is the method that can be used in a quadratic equation whereby one equation is solved and substituted into the next equation.
The given equation such as;
4x - 5y = 7 ---> eq 1
4X -9y = -4---> eq 2
From eq1 make 4x the subject of formula
4x = 7 + 5y
Substitute for 4x in equation 2;
7 + 5y - 9y = -4
7 - 4y = -4
7+4 = 4y
11 = 4y
y = 11/4
y = 2.75
Then substitute y = 2.75 into equation 1;
4x - 5y = 7
4x - 5(2.75) = 7
4x - 13.75 = 7
4x = 7 + 13.75
4x = 20.75
X = 20.75/4
X = 5.2
Therefore with the substitution method the value of X and y can be determined.
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20. college majors there are three sections of english 101. in section i, there are 25 students, of whom 5 are mathmatics majors. in section ii, there are 20 students
Answers
The probability that the student is from Section I, given that he or she is a mathematics major, is 0.214 and the probability that the student is from Section 1, is 0.294.
In the give question;
There are three sections of English 101.
In Section 1, there are 25 students, of whom 3 are mathematics majors.
In Section II, there are 20 students, of whom 7 are mathematics majors.
In Section lIl, there are 40 students, of whom 4 are mathematics majors.
We have to find the probability that the student is from Section I, given that he or she is a mathematics major and the probability that the student is from Section 1.
Total number of students in all sections = 25+20+40 = 85
Total number of students major in mathematics = 3+7+4 = 14
The probability that the student is from Section I, given that he or she is a mathematics major is represented as
P(I | M) = P(I∩M)/P(M)
P(I∩M) = (Student in section II - Student in section III)/Total student in all sections
P(I∩M) = (7 - 4)/85 = 3/85
P(M) = Total student of mathematics/Total student in all sections
P(M) = 14/85
Now putting the values
P(I | M) = (3/85)/(14/85)
P(I | M) = 3/14
P(I | M) = 0.214
Now finding the probability that the student is from Section 1.
Probability that student is from section I = Total students in section I/ total students
Probability that student is from section I = 25/85
Probability that student is from section I = 0.294
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The right question is:
There are three sections of English 101. In Section 1, there are 25 students, of whom 3 are mathematics majors, In Section II, there are 20 students, of whom 7 are mathematics majors. In Section lil, there are 40 students, of whom 4 are mathematics majors. A student in English 101 is chosen at random. Find the probability that the student is from Section I, given that he or she is a mathematics major. The probability that the student is from Section 1 is (Simplify your answer. Round to three decimal places as needed.)
create an equation to describe the relationship between the rise in temperature (y) and he change in time ( x) for the period from 6 to 24 minutes math connections
Answers
y = mx + b where m is the rate of change and b is the y-intercept, describes the linear relationship between rise in temperature (y) and change in time (x) from 6 to 24 minutes.
To calculate the linear equation, we can use the Point-Slope Form of a Line formula, y = mx + b. To find the slope (m), we must calculate the rise (change in the y-value) over the run (change in the x-value). We must calculate the temperature difference between 6 minutes (T1) and 24 minutes (T2). Then, divide the temperature difference by the time difference of 18 minutes. The y-intercept (b) can be found by plugging in the known x and y values of 6 minutes and T1 respectively into the equation y = mx + b. Once we have the slope and y-intercept, we can plug them into the equation y = mx + b to calculate the equation that describes the linear relationship between the rise in temperature (y) and change in time (x) from 6 to 24 minutes.
y = mx + b, where
m = (T2 - T1)/(24 - 6) = (T2 - T1)/18
b = T1 - (m*6)
Therefore,
y = (T2 - T1)/18 * x + (T1 - (m*6))
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The integer 5 makes which of the following equation false
Answers
Answer: 3m+4=6m is the false equation
Step-by-step explanation:
Substitute 5 into the 4 equations to find whether they are true or false
3(5)+4=6(5)
15+4=30
19[tex]\neq[/tex]30 False
-5(5-7)=10
-5(-2)=10
10=10 true
17=4(5)-3
17=20-3
17=17 True
5+9=14
14=14 True
3m+4=6m is the false equation
Perform the indicated operations.
c +6b/(-2bc-6ab- 3a²) + 2b/(a² + 2ab) - b/(ac - 3a²)
Answers
The simplified expression is c²a³ - 3[tex]a^4[/tex]c + a²bc² - a³bc - 3[tex]a^4[/tex]b+ 4ab²c² - 22a²b²c + 36a³b + 12a³b² / (-2bc-6ab- 3a²)(a² + 2ab)(ac - 3a²).
What is Algebra?A branch of mathematics known as algebra deals with symbols and the mathematical operations performed on them.
Variables are the name given to these symbols because they lack set values.
In order to determine the values, these symbols are also subjected to various addition, subtraction, multiplication, and division arithmetic operations.
Given:
c +6b/(-2bc-6ab- 3a²) + 2b/(a² + 2ab) - b/(ac - 3a²)
Now, simplifying
(c+ 6b) (a² + 2ab)(ac - 3a²) + 2b(-2bc-6ab- 3a²)(ac - 3a²)- b (-2bc-6ab- 3a²)(a² + 2ab) / (-2bc-6ab- 3a²)(a² + 2ab)(ac - 3a²)
= ca² + abc + 6a²b + ab² (ac - 3a²) + (4b²c - 12ab² - 6a²b)(ac - 3a²) - ( -2b²c - 6ab² - 3a²b)(a² + 2ab) / (-2bc-6ab- 3a²)(a² + 2ab)(ac - 3a²)
= c²a³ - 3[tex]a^4[/tex]c + a²bc² - 3a³bc + 6a³bc - 18[tex]a^4[/tex]b + 4ab²c² - 12a²b²c - 12 a²b²c+ 36a³b - 6a³bc + 18[tex]a^4[/tex]b + 2a²b²c + 4a³bc + 6a³b² + 12a²b³ - 3[tex]a^4[/tex]b + 6a³b² / (-2bc-6ab- 3a²)(a² + 2ab)(ac - 3a²)
= c²a³ - 3[tex]a^4[/tex]c + a²bc² - a³bc - 3[tex]a^4[/tex]b+ 4ab²c² - 22a²b²c + 36a³b + 12a³b² / (-2bc-6ab- 3a²)(a² + 2ab)(ac - 3a²)
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help solve this there is reward
you have ten mangoes and twelve carrots that cost 23$ in total, five mangoes and four carrots cost ten dollars what does one mango and one carrot cost
Answers
Answer:1 carrot cost .75 cents and a mango cost 1.40
Step-by-step explanation:
12 carrots + 10 mangoes = 23$
4 carrots + 5 mangoes = 10$
I know to get from 5 mangoes to 10 mangoes you have to multiply twice. so it wil come up to 20 dollars
8 carrots + 10 mangoes = 20$
divide by 2
that will leave 4 carrots and 3 dollars.
4/3 = .75
17 dollars is left
so 10 carrots is equal to 14 dollars
14/10 = 1.4 dollars
) A line is described by the equation y=5/3 x-6. What is the y-intercept?
Answers
Answer:
y- intercept = - 6
Step-by-step explanation:
the equation of a line in slope- intercept form is
y = mx + c ( m is the slope and c the y- intercept )
y = [tex]\frac{5}{3}[/tex] x - 6 ← is in slope- intercept form
with y- intercept c = - 6
Two independent simple random samples are taken to test the difference between the means of two populations whose standard deviations are not known, but are assumed to be equal. The sample sizes are n1 - 25 and n2-35. The correct distribution to use is the 1) t distribution with 59 degrees of freedom 2) t distribution with 58 degrees of freedom. 3) t distribution with 61 degrees of freedom. 4) t distribution with 60 degrees of freedom e in tne abintres of students enroled n staustucs today if there is any diffe statistics teacher wants to see and those enrolled five years ago.
Answers
2- T-distribution with 58 degrees of freedom
When the estimated standard deviation rather than the actual standard deviation is used as the denominator, the t-distribution is a continuous probability distribution of the z-score.
The largest number of logically independent values—that is, values with the freedom to change—in the data sample is referred to as the degree of freedom. If there is a remaining requirement for the data sample, particular data sample items must be picked after the degree of freedom quantity has been decided.
[tex]t[/tex] = Student's t-distribution
[tex]X{i}[/tex] = sample mean
μ = population mean
[tex]s[/tex] = sample standard deviation
[tex]n[/tex] = sample size
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The largest number of logically independent values—that is, values with the freedom to change—in the data sample is referred to as the degree of freedom. If there is a remaining requirement for the data sample, particular data sample items must be picked after the degree of freedom quantity has been decided.
When the estimated standard deviation rather than the actual standard deviation is used as the denominator, the t-distribution is a continuous probability distribution of the z-score.
a teacher figures that final grades in the statistics department are distributed as: a, 25%; b, 25%; c, 40%; d, 5%; f, 5%. at the end of a randomly selected semester, the following number of grades were recorded. find only the test statistics to test the claim that the grade distribution for the department is different than expected. be sure to set up the equation. do not conduct the hypothesis testing. grade a b c d f number 42 36 60 8 14
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The critical value is 13.28 when the distribution of final marks in the statistics department.
Given that,
According to a teacher, the distribution of final marks in the statistics department is: A, 25%; B, 25%; C, 40%; D, 5%; and F, 5%. The following number of grades were recorded at the conclusion of a randomly chosen semester.
We have to recognize the important value.
We know that,
Given a=0.01,
The critical value of chi-square with 0.99,
df=n-1=4 is
13.28 (From chi-square table)
Therefore, The critical value is 13.28 when the distribution of final marks in the statistics department.
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TRUE/FALSE. a negative covariation means that there is a negative change in the investment associated with it. group of answer choices
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The answer is false. The covariance statistic gauges how closely two variables are related to one another.
What is covariayion?a connection between two quantitative variables in which the corresponding values of the second variable tend to rise when the value of the first variable tends to rise (or fall) (or decrease).
The direction of the link between two variables is measured by covariance. A positive covariance indicates that both variables frequently exhibit high or low values together. While two variables have a negative covariance, they are often low when one is high.
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Find the length of the third side. If necessary, write in simplest radical form. 3. 4 Need Answer ASAP
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The answer is √7.
What is Pythagorean theorem?
The Pythagorean theorem, sometimes known as Pythagoras' theorem, is a basic relationship between a right triangle's three sides in Euclidean geometry. According to this statement, the areas of the squares on the other two sides add up to the size of the square whose side is the hypotenuse.
Step-by-step explanation:
Using the pythagorean theorem, we know that
a^2 + b^2 = c^2
In this case,
c = 4, which means that a^2 + b^2 = 16
Since we know that a = 3, this means that a^2 is also 9. So, we know that b^2 = 16-9
Therefore, b^2 = 7
So, the answer is √7.
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Jane wanted a single board cut into 8 equal pieces. The lumber company charges 60 cents for cutting a board into 4 equal pieces. How much will it charge for cutting Names board ?
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The charge for cutting a board into 8 equal pieces is $1.2
How much will it charge for cutting Names board?Charges for cutting a board into 4 equal pieces = $0.60Charges for cutting a board into 8 equal pieces = xEquate charges for cutting board : Number of equal pieces
0.60 : 4 = x : 8
0.60/4 = x / 8
cross product
0.60 × 8 = 4 × x
4.8 = 4x
divide both sides by 4
x = 4.8 / 4
x = 1.2
Therefore, it will cost $1.2 for cutting a board into 8 equal pieces.
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The weight. In grams, of a population of bacteria at time t hours is modeled by the function W the solution to a logistic differential equation. Selected values of W and its first and second derivatives are shown in the table above. Which of the following statements is true? W (35 – W/), because the carrying capacity is 35 and the rate of change of the weight is 6 grams per hour when the weight is 10 grams. W (35 – W), because the carrying capacity is 35 and the fate of change of the weight is 3 grams per hour when the weight is 10 grams (70W). because the carrying capacity is 20 and the rate of change of the weight is 6 grams per hour when the weight is 10 grams. Om de operation because the cauruna capacity te 70 and the rate of change of the wengrana
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With regards to the function model then the true statement as per first and second derivatives is: (C) dw/dt = 1/100 W (70 - W),
When, W = 10 then dw/dt = 6
When W = 35 then d²w/d²t = 0
where the point influx occurs, the weight of the carrying capacity is half
Therefore, 35 = a/2
Then the carrying capacity (a) = 35 x 2
a = 70
A function's sensitivity to change with respect to a change in its argument is measured by the derivative of a function of a real variable. Calculus's core tool is the derivative. It is a crucial idea that is incredibly helpful in a variety of contexts: in daily life, the derivative can inform you how fast you are driving or assist you in predicting stock market changes; in machine learning, derivatives are crucial for function optimization.
Therefore, with regards to the function model then the true statement as per first and second derivatives is: (C) dw/dt = 1/100 W (70 - W), because the carrying capacity is 70 and the rate of change of the weight is 6 grams per hour when the weight is 10 grams.
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Please kindly answer the question with a quick answer.
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Answer:
Step-by-step explanation:
what is your question?
Fifty part time college students were asked how many hours they work per week. The graphs below summarize their responses. Frequency 12+ 10 81 6 0 10 30 40 0 10 30 40 20 Hours 20 Hours What is the best measure of center for this data? Estimate the value of that measure of center.
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The best measure of center for the frequency of the data is Mean. The value of the measure of the center is 30.
The Mean value refers to an intermediate value between a discrete set of numbers. It is a measure of central tendency in a data set. In statistics, the term average refers to any of the measures of central tendency. The arithmetic mean of a set of observed data is defined as being equal to the sum of the numerical values of each and every observation, divided by the total number of observations. Fifty part time college students were asked how many hours they work per week.
Frequency 12 10 81 6 0 10 30 40 0 10 30 40 20 Hours 20 Hours.
we can calculate mean by adding all the frequencies and then divide it by the number of observations.
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A bag contains 3 gold marbles, 6 silver marbles, and 29 black marbles. Someone offers to play this game: You randomly select one marble from the bag. If it is gold, you win $3. If it is silver, you win $2. If it is black, you lose $1.
What is your expected value if you play this game?
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The expected value of the game that you play will be negative 0.21.
What is the expected value?In parameter estimation, the expected value is an application of the weighted sum. Informally, the expected value is the simple average of a considerable number of individually determined outcomes of a randomly picked variable.
The expected value is given below.
E(x) = np
Where n is the number of samples and p is the probability.
A pack contains 3 gold marbles, 6 silver marbles, and 29 dark marbles. Somebody offers to play this game: You haphazardly select one marble from the pack. Assuming it is gold, you win $3. Assuming it is silver, you win $2. Assuming it is dark, you lose $1.
The expected value is given as,
E(x) = 3(3/38) + 2(6/38) - 1(29/38)
E(x) = 0.2368 + 0.3158 - 0.7632
E(x) = -0.21
The expected value of the game that you play will be negative 0.21.
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