State the null and alternative hypotheses for the claimA report from five years ago said that the average income of accountants was $51,497; but nowadays it's more than that.

State The Null And Alternative Hypotheses For The ClaimA Report From Five Years Ago Said That The Average

Answers

Answer 1

ANSWER and EXPLANATION

We want to state the null and alternative hypotheses for the claim given.

A null hypothesis is a statement about a population parameter such that the likelihood can be tested to either accept or reject the alternative hypothesis.

An alternative hypothesis on the other hand is a statement that directly contradicts the null hypothesis.

Therefore, going by that, we see that the null hypothesis is:

[tex]\mu=\$51,497[/tex]

and the alternative hypothesis is:

[tex]\mu>\$51,497[/tex]


Related Questions

Sketch a graph of 6 x + 4 y = 4

Answers

The graph of 6x + 4y = 4 can be sketched as shown in the image attached below.

How to Sketch the Graph of a Linear Equation?

A linear equation can be expressed in standard form as Ax + By = C, where A, B, and C are integers. Also, it can be rewritten in slope-intercept form as y = mx + b, where b is the y-intercept and m is the slope of the equation.

In order to graph an equation, we can easily determine what the slope (m) and the y-intercept (m) of the graph would be when we rewrite the equation in slope-intercept form.

Given the equation in standard form as, 6x + 4y = 4, rewrite it in slope-intercept form:

6x + 4y = 4

4y = -6x + 4

y = -6x/4 + 4/4

y = -3/2x + 1

This means that the slope of the graph you'd sketch will be -3/2, and the line must intercept the y-axis at 1, because the y-intercept is 1.

The graph is shown below.

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Thank for helping have a great rest of your night

Answers

Given

The number of red balloons is 5.

The number of blue balloons is 7.

The number of yellow balloons is 12.

Explanation

To find the probability of randomly selected a yellow balloon

[tex]P=\frac{number\text{ of red balloons}}{total\text{ number of balloons}}[/tex][tex]\begin{gathered} P=\frac{12}{5+7+12} \\ P=\frac{12}{24} \\ P=\frac{1}{2} \end{gathered}[/tex]Answer

Hence the correct option is C that is 1/2.

the wholesale price for a pair of shoes is $5.50. A certain department store marks up the wholesale price by 40%. Find the price of shoes in the department store.

Answers

EXPLANATION

Price of shoes = $5.50

Markup= 40%

Let's call x to the unknown final price.

The markup percentage relationship is given by the following formula:

[tex]\text{Markup =( }\frac{Selling\text{ Price}-\text{Cost Price}}{\text{Cost Price}})\cdot100[/tex]

Replacing terms:

[tex]\text{40}=(\frac{x-5.5}{5.5})\cdot100[/tex]

Multiplying both sides by 5.5:

[tex]40\cdot5.5=(x-5.5)\cdot100[/tex]

Dividing both sides by 100:

[tex]\frac{40\cdot5.5}{100}=x-5.5[/tex]

Adding 5.5 to both sides:

[tex](\frac{40\cdot5.5}{100})+5.5=x[/tex]

Simplifyng the fraction:

[tex]2.2+5.5=x[/tex]

Adding numbers:

[tex]\text{7}.7\text{ = x}[/tex]

Switching sides:

[tex]x=7.7[/tex]

Answer: The final price of the shoes in the deparment store is $7.7

I don't understand this at all.

Answers

Answer:

            P1V1T2

T1=       _______

              P2V2

Step-by-step equation:

Find (f - g)(x)
f(x) = 3x² - 2x
g(x) = 9x²2 - x + 7
A. -6x²-x-7
B. 6x²-x+7
C. 12x²-x-7
D. -6x²-3x - 7

Answers

The solution to the given function is (f-g)(x) = -6x² - x - 7.

What is a function?

Function, in mathematics, an expression, rule, or law that defines a relationship between : one variable (the independent variable) and another variable (the dependent variable).

A function is an equation with a single solution for y for each value of x. Each input of a particular type receives exactly one output when using a function. Instead of y, a function is frequently named f(x) or g(x). When x equals 2, we should determine our function's value because f(2) says to do so.

Given: f(x) = 3x² - 2x

g(x) = 9x² -x + 7

To find: ( f - g )(x)

thus (f-g)(x)= 3x² - 2x - ( 9x² - x + 7)

(f-g)(x) = -6x² - x - 7

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find perimeter and area of each triangle round to nearest hundredth

Answers

Given is a right angled triangle. Consider the figure,

Using the trignoetric funcyion tan, we have,

[tex]\begin{gathered} \tan 18=\frac{a}{12} \\ a=12\times\tan 18=3.89 \end{gathered}[/tex]

Now, as we have base, a = 3.89 and height c = 12, the perimeter can be calcualted as,

[tex]\begin{gathered} P=a+c+\sqrt[]{a^2+c^2} \\ \text{ =3.89+12+}\sqrt[]{3.89^2+12^2}=28.5=29 \end{gathered}[/tex]

Now, the area can be calculated as,

[tex]\begin{gathered} A=\frac{1}{2}ac \\ \text{ =1/2}\times3.89\times12=23.34=23 \end{gathered}[/tex]

30 60 90° triangles find the measure of the missing two sides for each figure below leave answer and rationalize and simple light form

Answers

Given : 30 60 90 triangle as shown in the following figure :

As shown : the hypotenuse of the triangle = 28√5

The side length opposite to the angle 30 =

[tex]\frac{1}{2}\cdot28\sqrt[]{5}=14\sqrt[]{5}[/tex]

The side length opposite to the angle 60 =

[tex]\frac{\sqrt[]{3}}{2}\cdot28\sqrt[]{5}=\frac{28}{2}\sqrt[]{3\cdot5}=14\sqrt[]{15}[/tex]

Mr. Rodriquez is purchasing throphies for each trophies for each child that play little ldag

Answers

From the information provided, Mrs Rodriguez wants to spend nothing more than $7.00 per trophy. That means she can spend less than $7.00 if she has to, but she cannot spend anything above that amount.

Therefore, the correct answer is option 2, and that is;

5 trophies for $30.00

With other options given, she would be spending above $7.00 per trophy

Pls help I’ll mark brainliest im too tired for this

Answers

Answer:

309.8$

Step-by-step explanation:

450.60 - 35.20*4

= 309.8

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The area of the desert is 25,000 square miles a scale drawing of the desert has a scale drawing 10 square inches. What is the scale of the map?

Answers

The scale of the map is 1 square inches = [tex]10^{13}[/tex] square inches.

Given that:-

Area of the desert = 25,000 square miles

Area of the desert in the map = 10 square inches

We have to find the scale of the map.

We know that,

1 mile = 63360 inches

Hence, conversion of square miles to square inches:-

1 mile * 1 mile = 63360 inches *63360 inches

1 square mile = 4,01,44,89,600 square inches

25,000 square miles = 40144893600*25000 = 10,03,62,24,00,00,000 square inches =[tex]10.036224 *10^{13}[/tex] ≈ [tex]10*10^{13}[/tex] square inches.

Now, we can say that [tex]10*10^{13}[/tex] square inches is scaled to 10 square inches.

Hence, the scale of the map is :-

1 square inches = [tex]10^{13}[/tex] square inches.

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Match the two lines that are parallel and the two lines that are perpendicular. Then, match the equations.

Answers

Step-by-step explanation:

A and C are parallel. equations G and E.

B and D are perpendicular (standing at a right angle = 90° to each other). equations F and H.

parallel means that both lines have the same slope.

the slope is the factor a of x when the equations look like

y = ax + b (slope-intercept form)

or

y - y1 = a(x - x1) (point-slope form)

"a" being the slope, b being the y-intercept (the y- value when x = 0), (x1. y1) being a point on the line.

the slope is specified as ratio (y coordinate difference / x coordinate difference) when going from one point to another.

the perpendicular slope to y/x is the upside down ratio and the sign is flipped.

e.g. the perpendicular slope to 5/4 is -4/5.

equation E is already in point-slope form.

the slope is 2/3, and the point (-9, -2) must be on the line.

only one line goes through the point (-9, -2) : C.

equation H is already in slope-intercept form.

the slope is 3/2, and the y-intercept is 5, meaning the line goes through the point (0, 5).

only one line goes through that point : D

equation F

2x + 3y = -21

3y = -2x -21

y = (-2/3)×x - 7

the slope is -2/3, which is perpendicular to 3/2 (equation H).

the y-intercept is -7, meaning the line goes through the point (0, -7).

only one line goes through that point : B

equation G

-2x + 3y = -6

3y = 2x - 6

y = (2/3)×x - 2

the slope is 2/3 (parallel to equation E).

the y-intercept is -2, meaning the line goes through the point (0, -2).

only one line goes through that point : A

3х2 + 14х — 49 = 0solve for x

Answers

The given expression 3x^2 +14x-49=0

we will de factorization tos solve for x

[tex]\begin{gathered} 3x^2+14x-49=0 \\ 3x^2-7x+21x-49=0 \\ (3x^2-7x)+(21x-49)=0 \\ \text{Taking x common from (}3x^2-7x)=x(3x-7) \\ \text{Taking 7 common from }(21x-49)=7(3x-7) \\ (3x^2-7x)+(21x-49)=0 \\ x(3x-7)+7(3x-7)=0 \\ \text{Taking (3x-7) common} \\ (3x-7)(x+7)=0 \\ \text{ Thus, for} \\ \text{(3x-7)=0} \\ 3x=7 \\ x=\frac{7}{3} \\ \text{and for (x+7)=0} \\ x+7=0 \\ x=-7 \end{gathered}[/tex]

The value of x is -7 and 7/3

Answer : x = -7 and x = 7/3

Human hair grows at a rate of about 6.849×10-4 cm per hour to 2.329×10−2 cm per hour. The rate depends on gender, genetics, age, and health. Find the difference between the high end and the low end of the range. Express your answer in scientific notation rounding to 2 decimal places.

Answers

Answer:

  2.×10^-2 cm/h . . . . rounded to 2 dp

  2.26×10^-2 cm/h . . . . rounded to 3 sf

Step-by-step explanation:

You want the difference in growth rates between 6.849×10^-4 cm per hour and 2.329×10^-2 cm per hour.

Difference

The difference of two numbers written in scientific notation requires that they have the same power-of-ten multiplier.

  2.329×10^-2 - 6.849×10^-4

  = 2.329×10^-2 - 0.06849×10^-2 = 2.26051×10^-2 = 0.0226051

Rounding

The question asks for the answer rounded to 2 decimal places and expressed in scientific notation.

  0.0226051 ≈ 0.02 = 2×10^-2 . . . . cm per hour

It makes more sense to round the mantissa to 2 decimal places, meaning the value is rounded to 3 significant figures.

  2.26051×10^-2 ≈ 2.26×10^-2 . . . . cm per hour

write 1.09 × 10^-4 in standard notation

Answers

1.09 × 10^-4 in standard form is

[tex]\text{ 1.09 x 10}^{-4}[/tex]


. Fritz spent two days last week writing his report and
another three days this week. In the last ten working
days, what fraction of the time has he been working
on his report?

Answers

Answer:

1/2

Step-by-step explanation:

5/10 which is the same as 1/2

Please see photo I think it is the first answer but I wanted to confirm

Answers

Hello

The sample which she has to study is 200

The answer to this question is option A

Convert 21,510 ft to mi

Answers

Answer:

4.0738636

Step-by-step explanation:

Graph the line that is perpendicular to the line
7x+8y= 16 and passes through the
point (7, 2).

Answers

The general equation of the line is 7x+8y−65=0 when the line equation is 7x+8y=16 and the point is (7,2) and is perpendicular to the given line.

What is line?

A line is a one-dimensional figure with no width and only length. A line is made up of a series of points that extend in opposite directions indefinitely. Two points in a two-dimensional plane determine it. Collinear points are two points that are located on the same line.

What is equation of line?

A straight line's general equation is y = mx + c, where m is the gradient and y = c is the value at which the line intersects the y-axis. This number c is known as the y-axis intercept.

here, the given equation is 7x+8y=16 and point is (7,2).

by the relation y = mx + c we will find the value of slope for the line.

8y=-7x+16

y=(-7/8 ) x+16

on comparing relation,

m=[tex]\frac{-7}{8}[/tex]

y=mx+b

b=y1-m.x1

b=2-(-7/8).7

b=65/8

y=(-7/8)x+65/8

final equation,

7x+8y=65

The required equation of the line is 7x+8y=65 for the given point and line.

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22% of the squirrels in Cititon Park are gray. What is the probability that, in a random sample of 322
squirrels, fewer than 71 are gray squirrels? Use a normal approximation to compute your answer.
Round your answer to 4 decimal places.

Answers

The probability is 0.4841 .

Probability theory is the name of the branch of mathematics that deals with probability.

Although there are many ways to interpret the concept of probability, probability theory approaches it in a formal mathematical manner by articulating it through a set of axioms. These axioms typically formalize probability in terms of a probability space, which connects a sample space of possible outcomes to a measure that accepts values between 0 and 1. Statistical mechanics or sequential estimation are two examples of how probability theory approaches can be used to describe complicated systems when only a piece of their state is known. A significant achievement in twentieth-century physics was the description of the probabilistic nature of physical events at the atomic scale in terms of quantum mechanics.

Given n = 322

p = 0.22

We know that from probability

μ = n × p = 0.22 ×322 = 70.84

σ = √(p × n×(1-p))  = 7.43

Now (P < 71) = P<70.84

Solving we get

P(z<-0.045)

= 0.48405

Therefore the probability is 0.4841

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can you please list 1-6 if they are rational irrational integer whole and natural

Answers

1. -14/2 = -7 Integer, Rational

2. √64 = 8 Natural, Whole, Integer, Rational

3. 0 Whole, Integer, Rational

4. π Irrational

5.

[tex]0.\bar{45}[/tex]

can be expressed as a fraction, then it's rational

6. 3/8 Rational

please help me ASAP!!

Answers

We have to solve:

[tex]\begin{gathered} 2^x-3=(x-6)^2-4_{} \\ 2^x-3+4=(x-6)^2 \\ 2^x+1=(x-6)^2 \end{gathered}[/tex]

We can not write a explicit expression to find the value of x, but we can test each option to see which one is correct:

[tex]\begin{gathered} x=5 \\ 2^5+1=(5-6)^2 \\ 33=(-1)^2\longrightarrow\text{Not true} \end{gathered}[/tex][tex]\begin{gathered} x=3 \\ 2^3+1=(3-6)^2 \\ 8+1=(-3)^2 \\ 9=9\longrightarrow\text{True} \end{gathered}[/tex][tex]\begin{gathered} x=4 \\ 2^4+1=(4-6)^2 \\ 17=(-2)^2\longrightarrow\text{Not true} \end{gathered}[/tex][tex]\begin{gathered} x=-2 \\ 2^{-2}+1=(-2-6)^2 \\ \frac{1}{4}+1=(-8)^2\longrightarrow\text{Not true} \end{gathered}[/tex]

Answer: x=3

kind of confused with this whole probability concept, i just need help with these here

Answers

Solution

For this case we have 0-9 possible digits (10) and 4 spaces for the code

Part a

The number of ways are using the multiplication principle:

10x9x8x7= 5040

Part b

p= 1/5040

Part c

If digits can be repeated we have this:

10x10x10x10= 10000

pythagorean theorem

Answers

Answer is a= 7.75 units squared
Your answer may need to be rounded depending on what your teacher requires

Step by step

Pythagorean theorem
a^2 + b^2 = c^2

a^2 + 2^2 = 8^2
a^2 + 4 = 64
Subtract 4 from each side

a^2 + 4 - 4 = 64 - 4

a^2 = 60

Take the square root of both side

a= 7.75 units

Answer:

7.75 units squared

Step-by-step explanation:

NO LINKS!! Please help me with this probability question​

Answers

Answer:  b) not independent

===========================================================

Explanation:

Define these two events

A = father born in Michigan

B = mother born in Michigan

The notation ~A and ~B represent the opposite of each defined event above.

According to the table

P(A) = 0.48

P(B) = 0.73

If A and B were independent, then P(A and B) = P(A)*P(B) = 0.48*0.73 = 0.3504 = 35.04% but this contradicts the 29% in the "father born in Michigan" column and "mother born in Michigan" row. The table states that P(A and B) = 0.29 should be the case instead of 0.3504.

Because of this contradiction, this means P(A and B) = P(A)*P(B) is false and therefore A and B are NOT independent

--------------------------------------

Another way to look at it:

P(A) = 0.48

P(A given B) = P(A and B)/P(B)

P(A given B) = 0.29/0.73

P(A given B) = 0.39726 approximately

If A and B were independent, then P(A) and P(A given B) would be the same value. However, they are not. This is another way to see why the events are NOT independent

Through similar calculations, P(B given A) = P(A and B)/P(A) = 0.29/0.48 = 0.6042 approximately which doesn't match with P(B) = 0.73; if A and B were independent then P(B) needs to be equal to P(B given A).

What is the product of 840 and 4.6 x 102 expressed in scientific notation?

Answers

We can rewrite the expression:

[tex]840\times4.6\cdot10^2=8.4\cdot10^2\times4.6\cdot10^2[/tex]

The product is,

[tex](8.4\times4.6)(10^2\times10^2)=(38.64)(10^{2+2})=38.64\times10^4[/tex]

Estimate sqrt(37) to the nearest tenth. Then locate sqrt(37) on a number line.137 =(Round to the nearest tenth as needed.)

Answers

The given number is

[tex]\sqrt{37}[/tex]

Which is equal to 6,0827625302982196889996842452021...

However, rounded to the nearest tenth is

[tex]\sqrt{37}\approx6.1[/tex]

The image below shows the number graphed on a number line.

Please help with this math problems! This is due in a few hours!

Answers

(i) The vertex's x-coordinate is 25.

(ii) The maximum height of the cannonball is 12.48 meters.

(iii) Total horizontal distance that a cannon ball can travel is 50 meters.

(iv) Total horizontal distance that a cannon ball can travel with decreased angle is 22.5 meters.

(v) Distance the cannonball traveled before reaching the maximum height is 25 meters.

What is coordinate?

A pair of values is used to specify a point's placement on a coordinate plane using both horizontal and vertical distinctions from the two separate axes. usually represented by a pair of x-values and y-values (x,y).

(i) They are both at y = 4 and separated by (40-10) = 30

The symmetry line is halfway between 40 and 10

Consequently, the vertex's x-coordinate is 25.

(ii) y = -0.01x2 + 0.5x, 

a = -0.01, 

b = 0.5,

-b/2(a) = -0.5/(2X-0.01) = 0.5/0.02, and so on.

y=-0.01*2+0.5(25) =12.48 meters

The maximum height of the cannonball is 12.48 meters.

(iii) Total horizontal distance that cannon ball can travel is (0,0)-(50,0)= 50 meters.

(iv)Total horizontal distance that cannon ball can travel with decreased angle is (0,0)-(22.5,0) =22.5 metres

(v) Distance cannon ball travelled before reaching the maximum height is [(0,0)-(50,0)]/2 =25 meters

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Create your own thought experiment explaining why a negative divided by a negative is a positive.

Answers

Dividing two negative numbers results in a positive number.A negative number divided by a negative number produces a positive result since two negatives equal a positive.

Explaining why a negative divided by a negative is a positive

The quotient is positive when two negative values are divided.The same guidelines apply to multiplication. Divided by another negative integer, a negative number always yields a positive number.divided equally by.The solution cannot be or any other negative number because it is positive. Divide two negative numbers, and you'll always get a positive number as the result.For instance, dividing -4 by -2 yields 2.The negatives cancel out when both numbers are negative, hence the outcome is always a positive number. Consider that you are taking part in a game that uses red and black chips.You will win one dollar (+1) at the end of the game for each black chip you have.You must pay one dollar for every red chip you possess.Assume that at some time throughout the game you have numerous bags of black chips and several bags of red chips. These chips are currently bundled together in bags of five.You make $15 if someone offers you three bags of black chips.(3)(5)=15.You lose 15 bucks if someone steals three of your bags of black chips.(-3)(5)=-15.You lose $15 if someone gives you three bags of red chips.(3)(-5)=-15.You lose $15 if someone gives you three bags of red chips.(3)(-5)=-15.You make 15 bucks if someone steals three of your bags of red chips.(-3)(-5)=15.The crucial concept is that negative numbers signify variations rather than totals.Saying that you have four slices of bread is illogical.However, it makes logical to state that since you had 4 slices of bread, the new number of slices you possess is 4.

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Find anequation for the perpendicular bisector of the line segment whose endpoints are(-8, 4) and (-4,-8).

Answers

to solve this question, we need to difine our variables

we have values for end points as

x1 = -8

y1 = 4

x2 = -4

y2 = -8

next we can find the slope of the equation

[tex]\begin{gathered} \text{slope}=\frac{y_2-y_1}{x_2-x_1} \\ \text{slope}=\frac{-8-4}{-4-(-8)} \\ \text{slope}=\frac{-12}{4} \\ \text{slope}=-3 \end{gathered}[/tex]

step 2

let's find the mid-point using mid-point formula

[tex]\begin{gathered} md=\frac{x_1+x_2}{2},\frac{y_2+y_1}{2} \\ md=\frac{-8+(-4)}{2},\frac{-8+4}{2} \\ md=-6,-2 \end{gathered}[/tex]

mid-point = (-6, -2)

now we know the perpendicular line travels (-6 , -2) and has a slope of -3

equation of a straight line => y = mx + c

we can solve for c to find the equation.

[tex]\begin{gathered} y=mx+c \\ -2=(-3)(-6)+c \\ -2=18+c \\ c=-2-18 \\ c=-20 \end{gathered}[/tex]

note: m = slope

c = intercept

the equation of the perpendicular bisector can be written as

y = -3x - 20

[tex]y=-3x-20[/tex]

give the answer, which of the following are composite numbers? 4 9 15 3 5

Answers

Given

we are given numbers 4, 9, 15, 3, 5

Required

we need to find which of the above numbers are composite.

Explanation

Here

[tex]\begin{gathered} 4=2\times2 \\ 9=3\times3 \\ 15=3\times5 \\ 3=3\times1 \\ 5=5\times1 \end{gathered}[/tex]

clearly 4, 9, 15 have factors other than 1 and itself.

so 4, 9 and 15 are composite numbers

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