Suppose that you wish to obtain a confidence interval for a population mean. Under the
conditions described below, should you use the z-interval procedure, the t-interval
procedure, or neither?
- The population standard deviation is unknown.
The data contain outliers.
- The sample size is small.
To obtain a confidence interval for a population mean under the t-interval procedure.
What is meant by population mean?The major trend discovered from the sample data is the sample mean. The population is used to create the sample data. In statistics, the sample mean is denoted by the letter "x." The population mean, on the other hand, is the average value of all observations within a certain population or group.The population mean can be determined by dividing the total number of values in the given data/population by the sum of all values in the data/population. The whole sum of the numbers is referred to as summation. The sign stands for the population mean.The population is the total number of people residing in a certain area. Estimating the population enables us to determine how many beings there are and how best to respond.To learn more about population mean refer to:
https://brainly.com/question/28103278
#SPJ1
Describe and correct error
a balance of $11,670. The bank statement indicated a balance of $13,640 on April 30. Comparing the bank statement and the accompanying canceled checks and memos with the records revealed the following reconciling items:
Checks outstanding totaled $4,910.
A deposit of $5,120, representing receipts of April 30, had been made too late to appear on the bank statement.
The bank collected $2,660 on a $2,520 note, including interest of $140.
A check for $770 returned with the statement had been incorrectly recorded by Lakeshore Gelato as $700. The check was for the payment of an obligation to Sprinkles Supply Co. for the purchase on account.
A check drawn for $40 had been erroneously charged by the bank as $400.
Bank service charges for April amounted to $50.
The balance of the bank reconciliation statement is $3,640
How to prepare a bank reconciliation statement?A bank reconciliation is is defined as the process by which the bank account balance in an entity’s books of account is reconciled to the balance reported by the financial institution in the most recent bank statement
The bank Reconciliation statement appears thus
Bank reconciliation statement
$ $
Cash book balance 11,670
Add unpresented cheque 5,120
Over cast (400-40) 360
17,150
Cheque not credited 5120
Less Uncredited cheque 4910
Notes collected 2660
Dishonored cheque 770
Bank charges 50
bank interest 140
13500
Balance as per bank statement 3640
In conclusion the balance of the Statement is $3640
Learn more about bank reconciliation statement on https://brainly.com/question/15525383
#SPJ1
help meeeeeeeeeee pleaseee
The number of acres owned for which the average intake is 2200 calories per day is 2 acres obtained by the algebraic expression that relates the acres of land and the calories per day.
What is an algebraic expression?An algebraic expression is formed by variables, constants, and arithmetic operations.An algebraic expression provides the relation between the input and output variables i.e., x and f(x) respectively.Calculation:It is given that, the number of calories consumed daily by a person owing x acres of land is given by the algebraic expression,
C(x) = 270 ln(x+1) + 1900
The average intake of calories consumed per day is given by C(x) = 2200
Here x is the number of acres of land. Then, the required number of acres of land is
C(x) = 270 ln(x+1) + 1900
⇒ 2200 = 270 ln(x+1) + 1900
⇒ 270 ln(x+1) = 2200 - 1900
⇒ 270 ln(x+1) = 300
⇒ ln(x+1) = 300/270 = 10/9
Applying base 'e' on both sides, we get
⇒ (x+1) = [tex]e^\frac{10}{9}[/tex]
⇒ x+1 = 3.0377
⇒ x = 3.0377 - 1 = 2.0377
When rounding the final answer to the nearest tenths, we get x = 2 acres.
When rounding the final answer to the nearest thousand, we get x = 2.038 acres.
Thus, for an average intake of 2200 calories per day, the number of acres of land owned is approximately 2 acres.
Learn more about algebraic expressions at the following link:
brainly.com/question/24875240
#SPJ1
a 5.2 kg cat and a 2.3 kg bowl of tuna fish are at opposite ends of the 4.0-mm-long seesaw. (figure 1) you may want to review (page) .
Moment about the pivot must be equal for the seesaw to balance. Initially, the first cat and the bowl are at 2 m from the pivot.
The moment due to cat = 5.3*2 = 10.6 kg.m
The moment due to bowl = 2.5*2 = 5 kg.m
The unbalanced moment = 10.6 - 5 = 5.6 kg.m
Therefore, the 3.7 kg cat should stand at a distance x from the pivot in left to balance the 5.6 kg.m.
That is,
3.7*x = 5.6 => x = 5.6/3.7 = 1.5134 m to the left (on the side of the bowl)
To learn more about moment visit:
https://brainly.com/question/28687664
#SPJ4
If the value of a commodity decreases at a monthly rate of 0.8%, by what percentage does it decrease in a year?
If the value of a commodity decreases at a monthly rate of 0.8%, by 9.6 percentage it decreases in a year.
What is the percentage?It's the ratio of two integers stated as a fraction of a hundred parts. It is a metric for comparing two sets of data, and it is expressed as a percentage using the percent symbol.
It is given that, the value of a commodity decreases at a monthly rate of 0.8%,
We have to find by what percentage the rate decreases in a year.
If there are 12 months in a year, the rate decrease in a year obtained as,
=0.8 × 12
=9.6 %
Thus, if the value of a commodity decreases at a monthly rate of 0.8%, by 9.6 percentage it decreases in a year.
Learn more about the percentage here:
brainly.com/question/8011401
#SPJ1
In a year, the value of commodity decreases by 9.6%, at the monthly rate of 8%.
What is ratio?Ratio basically compares quantities, that means it show value of one quantity with respect to other quantity.
If a and b are two values, their ratio will be a:b,
Given that,
Monthly decrease rate of change in commodity = 0.8 %,
To find the percentage decrease in year,
Use ratio property,
In 1 month, commodity decreases 0.8%
In 12 months commodity decreases = 12 x 0.8 = 9.6 %
The value of commodity will decrease by 9.6% in a year.
To know more about Ratio on:
https://brainly.com/question/23724140
#SPJ1
help me please thank youuuu
Answer:
B. g(x) = -x² - 2
Step-by-step explanation:
f(x) = x²
g(x) = -x²
The graph now has a maximum of (0, 0) and is curving downwards. To make the graph go down by -2 subtract 2 from the equation
g(x) = -x² - 2
I hope this helps!
A quadratic function has an "a" value of (2) and a vertex at (5,-18) How many solution does the function have, and what are they?
The function bas solution (s), which is x=__ and x=___ (Write NA tar the second box at there is only one solution)
The function has 2 solutions which is x = 2 and x = 8.
What is a quadratic function?
A quadratic function is a polynomial function with one or more variables in which the highest exponent of the variable is two.
Solution:
Given :
a = 2 , vertex = (5, -18)
f(x) = a(x-h)² + K
f(x) = 2(x - 5)² - 18
f(x) = 2(x² -10x + 25) -18
f(x) = 2x² - 20x +50 - 18
f(x) = x² - 10x +16
∴ x² -10x + 16 = 0
x² - 8x - 2x + 16 = 0
x(x-8) -2(x-8) = 0
(x-2) = 0 and (x-8) = 0
∴ x = 2 and x = 8
To learn more about quadratic functions :
https://brainly.com/question/15513662
#SPJ4
The quadratic function has 2 solutions which is x = 2 and x = 8.
What is a quadratic function?A quadratic function is a polynomial function with one or more variables in which the highest exponent of the variable is two. A polynomial of degree two in one or more variables in mathematics is known as a quadratic polynomial. Any polynomial function that is defined by a quadratic polynomial is said to be quadratic.
The terms "quadratic polynomial" and "quadratic function" were almost interchangeable before the 20th century because it was difficult to tell a polynomial from its corresponding polynomial function. This is still true in many elementary courses where "quadratic" is frequently used to refer to both terms.
Solution:
Given :
a = 2 , vertex = (5, -18)
f(x) = a(x-h)² + K
f(x) = 2(x - 5)² - 18
f(x) = 2(x² -10x + 25) -18
f(x) = 2x² - 20x +50 - 18
f(x) = x² - 10x +16
∴ x² -10x + 16 = 0
x² - 8x - 2x + 16 = 0
x(x-8) -2(x-8) = 0
(x-2) = 0 and (x-8) = 0
∴ x = 2 and x = 8
To learn more about quadratic functions :
https://brainly.com/question/1214333
#SPJ4
Determine the slope of the line represented by the equation: 1 x − 3 y = − 14
Answer:
The slope is 1/3
Step-by-step explanation:
The equation is equivalent to
x - 3y = -14
x = 3y - 14
x + 14 = 3y
(x + 14)/3 = y
What is the greatest common factor between 24, 56, and 72? 01 2 5 08
Answer: The common factor is 8
Step-by-step explanation:
Each is a variant of the number 8 and 2 but it called for the greater common factor so 8
A time series-based forecast is a form of ____ or, assuming that patterns observed in historical data will prevail in the future.
Time series forecasts are developed based on time series analysis, which comprises methods for analyzing time series data to extract meaningful statistics and other characteristics of the data.
One of the most often used data science techniques in business, finance, supply chain management, production, and inventory planning is time series forecasting.
A time component is often present in prediction difficulties, necessitating the extrapolation of time series data or time series forecasting. Another crucial field of machine learning (ML) is time series forecasting, which may be viewed as a supervised learning issue.
It can be subjected to ML techniques including regression, neural networks, support vector machines, random forests, and XGBoost. Using models created from historical data to anticipate future observations is known as forecasting.
To learn more about forecasting
brainly.com/question/14212005
#SPJ4
PLEASE HELP ME!!! I WILL GIVE BRAINLIST!!! PLEASE
Answer:
A: AB corresponds to FG
Step-by-step explanation:
The question is asking for which statement if not true/false.
Answer choice A is false because when you turn the rectangle, AB does not end up where FG is. Instead, AB ends up where EF is. Also, the length of AB is 6 units, while the length of FG is 4 units. So, they cannot correspond to each other.
Z is the midpoint of XY. Complete the proof that ∠Y ≅ ∠X .
Statement Reason
Z is the midpoint of overline XY Given
WZ ⊥ XY Definition of perpendicular lines
angle WZX ≅ angle WZY Definition of isosceles triangle
line XA ≅ line YZ Definition of bisection
line WZ ≅ line WZ Reflexive Property of Congruence
Δ WXZ ≅ Δ WYZ Side - Angle - Side (SAS)
< Y ≅ < X Corresponding Parts of Congruent Triangles are Congruent
What is congruency in triangle?Triangles are said to be congruent when the sides and angles equal in accordance to to the triangle congruency rules
Some of the rules include
Side - Side - Side = SSSSide - Angle - Side = SASAngle - Side - Angle = ASA Angle - Angle - Side = AAS Hypotenuse and one leg = HLThe problem requires the prove by Side - Angle - Side = SAS to ensure that the the triangles are congruent
The SAS have it that the two triangles being compared should have their two sides and the included angle equal
Using Corresponding Parts of Congruent Triangles are Congruent CPCTC theorem ∠Y ≅ ∠X .
Learn more on proof involving angles here:
https://brainly.com/question/29189788
#SPJ1
Fully simplify.
16x^5y^4(14x^2y^2)
16x
5
y
4
(14x
2
y
2
)
The fully simplified form of the given expression 16x⁵y⁴ / ( 14x²y² ) following from the laws of indices is; 8x³ y² / 7.
What is the fully simplified form of the given expression 16x⁵y⁴ / ( 14x²y² )?It follows from the task content that the fully simplified form of the given expression 16x⁵y⁴ / ( 14x²y² ) is to be determined.
Since the given expression is; 16x⁵y⁴ / ( 14x²y² ).
As evident in the task content; same base terms are present in the numerator and denominator; we therefore have that;
The expression can be simplified as follows using the laws of indices as follows;
[tex] \frac{16 {x}^{5} {y}^{4} }{14 {x}^{2} {y}^{2} } [/tex]
It follows from the quotient of exponents law of indices; we have that;
[tex] \frac{8}{7} {x}^{5 - 2} {y}^{4 - 2} [/tex]
= 8x³ y² / 7
Therefore, the fully simplified form of the given expression using the laws of indices is; 8x³ y² / 7.
Read more on laws of indices;
https://brainly.com/question/24291110
#SPJ1
Which point would not be a solution to the system of linear inequalities shown
below?
y > 2x - 2
O (-5,3)
O (-5, 10)
O (-10,8)
O(-10,-9)
Y >
6
5+8
The solution to the linear inequality y > 2x - 2 and y > 5x + 8 is -3.33 and -8.67
Graph of Linear InequalityThe graph of an inequality in two variables is the set of points that represents all solutions to the inequality. A linear inequality divides the coordinate plane into two halves by a boundary line where one half represents the solutions of the inequality. The boundary line is dashed for > and < and solid for ≤ and ≥.
Using a graphing calculator, the solution of y > 2x - 2 and y > 5x + 8 is
This will give us a value of x is -3.33 and y is -8.67
Kindly find attached graph below
Learn more on graph of linear inequality here;
https://brainly.com/question/23093488
#SPJ1
Can you help me fast please
Find f(-2) for f(x) = 2 • 3^x
Function f(x) is 2/9.
Which is a function example?F(x) = sin x, F(x) = x2 + 3, F(x) = 1/x, F(x) = 2x + 3, etc. are a few further instances of functions. Mathematical functions come in many different varieties. Among the crucial kinds are: injection technique or One-to-one relationship: when there is a mapping between two sets for a range for each domain.If a function depends on another variable, you write it as f(x), g(x), or even h(t), depending on the dependant variable. You read f(x) and h(t) as "f of x" and "h of t," respectively. Not all functions must be linear. The nonlinear function g(x) = -x2 -3x + 5 is defined as follows.f(-2) for f(x) = 2 • 3^x is 2/9.
To learn more about functions refer to:
https://brainly.com/question/25638609
#SPJ1
what's the answer? The double number line shows that Henrik has a mass of 60kg
The required solutions of percentages are below as :
100% of 60 kg = 60 kg, 20% of 60 kg = 12 kg, and 40% of 60 kg = 24 kg.
What is the percentage?The percentage is defined as a ratio expressed as a fraction of 100.
The double number line shows that Henrik has a mass of 60kg.
According to the given question, the required solution would be as:
100% of 60 kg
⇒ (100/100) x 60
⇒ 1 x 60
⇒ 60
So, 100% of 60 kg = 60 kg
20% of 60 kg
20% is expressed as 20/100 in fractional form
⇒ (20/100) x 60
20/100 is expressed as 0.20 in decimal form
⇒ 0.20 x 60
Apply the multiplication operation, and we get
⇒ 12
So, 20% of 60 kg = 12 kg
40% of 60 kg
⇒ (40/100) x 60
⇒ 0.40 x 60
⇒ 24
So, 40% of 60 kg = 24 kg.
Thus, the required solutions are 100% of 60 kg = 60 kg, 20% of 60 kg = 12 kg, and 40% of 60 kg = 24 kg.
Learn more about the percentages here:
brainly.com/question/24159063
#SPJ1
What is the distance between the points (6.2, -4) and
(4.5, -4)
Answer:1.7
Step-by-step explanation:
Identify each as a function or not a function.
The population of Orange County is represented by the function f(x)=87,000(0.9), where x is the number of years since 2010 The population of Greene County was 78,000 in 2010, and has decreased exponentially at a rate of 8% each year
How do the populations of these counties compare in 2015?
Drag a value or word to the boxes to correctly complete the statements
Question 1
In 2015, [tex]x=5[/tex]. [tex]P(5)=87000(0.9)^5 \approx \boxed{51373}[/tex]
Question 2
[tex]78000(1-0.08)^5 \approx \boxed{51408}[/tex]
Question 3
[tex]51408 > 51373[/tex], so Greene county was more populous.
Which of the following algebraic steps will solve the equation -6t = 2/3
Answer:
t= 0.1 or t= 1/9Step-by-step explanation:
divide each term in 6t = 2/3 by 6,6t/6 = 2/3/6
simplify the left sidecancel out the common factor of 6.6t/6 = t while were left with 2/3 /6
divide t by 1.t = 2/3 / 6.
simplify the left sidemultiply the numerator by the reciprocal of the denominator.t = 2/3 x 1/6
cancel the common factor of 2.Factor 2 out of 6.t = 2/3 x 1/2(3)
Cancel the common factor which is 2,and then rewrite the expression.t = 1/3 x 1/3
Multiply the expression like this:t = 1 / 3 x 3
multiply 3 by 3 to get...t=1/9
decimal form: 0.1
What is 10% of 20? Hint: We can think of 10% as a common fraction. HELP ME PLS
Answer:
Step-by-step explanation:
10% of 20 is equal to 2. To calculate 10% of a number, we can multiply the number by 10% expressed as a decimal, which is 0.1. For example, 10% of 20 is equal to 20 * 0.1 = 2.
Alternatively, we can calculate 10% of a number by dividing the number by 100 and then multiplying the result by 10. For example, 10% of 20 is equal to (20 / 100) * 10 = 2.
i need help especially for #4
The values of x in the first, second, third and fourth triangles are 4 units, 70°, 76° and 80° respectively
How to determine the values of x in the triangle?
To solve this problem, we need some angle geometry knowledge:
For the first triangle:
x = 4 (All sides in a rhombus are identical)
For the second triangle:
The missing side is also equal to x (base of isosceles triangles)
x + x + 40 = 180 (sum of angles in triangle)
2x+40 = 180
2x = 180-40
2x = 140
x = 70°
For the third triangle:
x = 76° (base of isosceles triangles are equal)
For the fourth triangle:
Check the image attached for labeling
m = 180-110 = 70° (angle on a straight line)
y = 70° (base of isosceles triangles are equal)
z = 180-70-70 = 40°
t = 90-40 = 50°
L = 50° (base of isosceles triangles are equal)
Thus, x = 180-50-50 = 80°
Learn more about angle geometry on:
brainly.com/question/29405364
#SPJ1
A
07
06
O15
09
B
15 m
2x+3
Given that
ABCD is a parallelogram, find the x.
Given that ABCD is a paralle log ram, find the value of x.
D
C
Answer:
x = 6
Step-by-step explanation:
the opposite sides of a parallelogram are congruent , then
2x + 3 = 15 ( subtract 3 from both sides )
2x = 12 ( divide both sides by 2 )
x = 6
A fair coin is to be tossed 10 times. Let i/j, in lowest terms, be the probability that heads never occur on consecutive tosses. Find i+j.
The probability that there are 89/1024 ways in which heads never happen on consecutive tosses.
Explain the definition of probability?Mathematics' study of random events is known as probability, and there are four primary types of probability: axiomatic, classical, empirical, and subjective. Since probability is the same as possibility, you could say that it is the likelihood that a specific event will occur.For the stared question;
Think of the flips as either a string of [Head first Tail] or [Tail]. Let x stand for the quantity of [Head followed by Tail] and y for the quantity of [Tail]. If 2x + y = 10, then.Then, for every value of x, I completed casework:
The number of configurations of AAAAAAAAAA is bijective to x=0 and is 1.
The number of configurations of AAAAAAAAB is then bijective to x=1, which really is 9 and so forth.
These variables add up to 89, and there are 1024 different ways to flip them.
P(i + j) = 89/1024
Thus, there are 89/1024 ways in which heads never happen on consecutive tosses.
To know more about the probability, here
https://brainly.com/question/13604758
#SPJ4
-3≤2x-1≤5
Step by step
Answer:
-1≤x≤3
Step-by-step explanation:
-3≤2x-1≤5
add 1 to all sides
-2≤2x≤6
divide all sides by 2
-1≤x≤3
A number is such that it is as much greater than 112 as it is less than it Find the number.
Answer:: 111
Step-by-step explanation:
111 is greater than 112 I hope it helps!!!!
I don’t know how to do it, please teach me !!!
As described in z-distribution the answers are given below:
a) The 95% confidence interval estimate for the population mean spending by a customer on visiting salon per month is given as follows: (747, 853).
b) The sampling error at 95% confidence level is of: $35.78.
What is a z-distribution ?
The normal distribution with a mean of 0 and a standard deviation of 1 is referred to as the standard normal distribution (also known as the Z distribution) (the green curves in the plots to the right). It is frequently referred to as the bell curve since the probability density graph resembles a bell.
solution:
The bounds of the confidence interval are given as follows:
In which:
is the sample mean.
z is the critical value.
n is the sample size. is the standard deviation for the population.
The parameters for this problem are given as follows:
Hence the lower bound of the interval is of:
800 - 200 x 1.96/square root of 55 = 747.
The upper bound of the interval is of:
800 + 200 x 1.96/square root of 55 = 853.
The sampling error for a sample size of 120 is calculated as follows:
200 x 1.96/square root of 120 = $35.78.
To learn more about the z-distribution from the given link
https://brainly.com/question/4079902
#SPJ1
3 Find the x-intercept of the equation x + 5y = 20. A 1 B 4 C 5 D 20
Answer:
line | Cartesian equation x + 5 y = 20 | x-intercept = 20 thus: D
Step-by-step explanation: