An entrepreneur is considering the purchase of a coin-operated laundry. The current owner claims that over the past 5 years, the average daily revenue was $675 with a standard deviation of $75. A sample of 30 days reveals a daily average revenue of $625. If you were to test the null hypothesis that the daily average revenue was $675 with a level of significance level of 0.01. Which test would you use and why?

a. Z-test of a population mean.
b. T-test of population mean.
c. Z-test of population proportion.
d. t-test of a population proportion

Answers

Answer 1

Answer:

a. Z-test of a population mean.

Step-by-step explanation:

The current owner claims that over the past 5 years, the average daily revenue was $675 with a standard deviation of $75.

This means that we have a large sample, which means that we can consider this to be the standard deviation for the population, which eliminates the t-test, leaving options a and c.

Population mean or proportion?

Mean, as a proportion is a value between 0 and 1, while average revenue may have lots of possible values. So the answer is given by option A.


Related Questions

An elementary school class ran 1 mile in an average of 11 minutes with a standard deviation of 3 minutes. Rachel, a student in the class, ran 1 mile in 8 minutes. A junior high school class ran 1 mile in an average of 9 minutes, with a standard deviation of 2 minutes. Kenji, a student in the class, ran 1 mile in 8.5 minutes. A high school class ran 1 mile in an average of 7 minutes with a standard deviation of 4 minutes. Nedda, a student in the class, ran 1 mile in 8 minutes.

Required:
a. Why is Kenji considered a better runner than Nedda, even though Nedda ran faster than he?
b. Who is the fastest runner with respect to his or her class? Explain why.

Answers

Answer:

Step-by-step explanation:

a.

Kenji ran faster than the class average by 0.25 of a standard deviation while Nedda was slower than the average in her class.

b.

Rachel: average - 1st deviation

Kenji: average - 0.25 standard deviation

Nedda: slower than average so it's definitely not her.

Since Rachel is faster than the average and differs by the most standard deviations compared with Kenji,

So, Rachel is the faster one.

what is 1/2 times 5/2

Answers

Answer:

= 5/4

Step-by-step explanation:

Multiply across, so we will multiply our numerators first.

1 x 5 = 5

Then we multiply our denominators

2 x 2 = 4

Thats why your answer is 5/4

Hope this helps (:

Hace 9 meses que no llueve cual es el número entero​

Answers

hnAnswer:

gjunn

Step-by-step explanation:

Answer:

en un menos de 9 meses

ya que es desmunusion es de 0

Gracie went for a morning walk and met her old friend Suzie and her daughter Jennie after a long time. Gracie asked Suzie how old is Jennie to which Jennie replied “In two years I will be twice as old as I was three years ago”. How old is Jennie?​

Answers

I believe she is 6 I am not positive about it

Consider the first four terms of the sequence below.

1, -1/2, 1/4, -1/8, ...

What is the 8th term of this sequence?

A. -1/256
B. 1/128
C. -1/128
D. 1/256

Answers

Answer:

the answer is C.-1/128......

simplify the expression 3x+2x

Answers

Answer:

=5x

Step-by-step explanation:

3x+2x

=3x+2x

=x+x+x+x+x

=5x

Step-by-step explanation:

step 1. 3x + 2x = 5x. that is the answer.

In this rectangle the base is 1 cm more than the hight

Answers

Answer:

the equation is base = height + 1

Solve for t.
45 = 5t + 45
Answer:
Submit Answer

Answers

Answer:

0

Step-by-step explanation:

45=5t+45

-45=-45

0=5t

/5

0=t

Hope this helped :)

Answer:

T=0

Step-by-step explanation:

Subtract 45 from both sides and then simplify then divide bith sides of the equation by the same term

Noah raised $54 to support the animal shelter, which is 60% of his fundraising goals. Write an equation to represent the situation. (In your answer, write 60% as 60/100.)

Answers

Answer:

54 x 1.4 = 54 x 140/100 = 75 60/100

75.6

Step-by-step explanation:

The function f is defined by f(x) = x + 3 / 4x - 5 . Find f(x+3).​

Answers

Answer:

x+6 / 4x-5

Step-by-step explanation:

Please please give answer for this question

Answers

Answer:

The remaining piece measures 16 m

which agrees with answer D

Step-by-step explanation:

In order to make a square of area 25 m^2, we need a square of side 5 m ,

Area of square = side^2

25 = side^2   then each side = 5 m

therefore the person needed 4 times 5 m  to create the square, that is 20 m for the square. Therefore the piece that is left can be calculated with the difference:

36 m - 20 m = 16 m

The remaining piece measures 16 m

hello help me please ​

Answers

Answer:

Step-by-step explanation:

divide each by 2 and see if you can get a proper fraction

Pat finds that the length of a ceiling beam is 114 inches what is the length of the beam in feet.
how to work it out in a problem​

Answers

Answer:

farted farted fartedfarted

Answer

Step-by-step explanation:

five and three sixths minus two and one third

Answers

Answer:

19/6

Step-by-step explanation:

5 3/6 - 2 1/3 = 19/6

Ms. Jones is making the yearbook. She has 7 pages with 153 photos on each
page. How many photos are there in the whole yearbook?

Answers

Answer:

1,071

Step-by-step explanation:

7 × 153 = 1071

plese follow me

T-shirts are on sale for 40% off. The original price per t-shirt is $20. What is the total cost, in dollars, of 8 of these t-shirts at the sale price, including an 11% sales tax?

Answers

Answer:

$106.56

Step-by-step explanation:

discounted price of each shirt is $12

12 x 8 = $96 for 8 shirt

96 x 1.11 = $106.56

Solve the given differential equation by using an appropriate substitution. The DE is a Bernoulli equation. t2 (dy/dt) + y2 = ty

Answers

Answer:

Step-by-step explanation:

[tex]t^2 \dfrac{dy}{dt}+ y^2 = ty \\ \\ t^2 \dfrac{dy}{dt}-ty = -y^2[/tex]

[tex]\text{by dividing both sides by }{y^2},\text{ we have:}[/tex]

[tex]\dfrac{t^2}{y^2}\dfrac{dy}{dt}- \dfrac{ty}{y^2}= -1[/tex]

[tex]\dfrac{t^2}{y^2}\dfrac{dy}{dt}- t\dfrac{1}{y}= -1[/tex]

[tex]\text{by dividing both sides by }t^2; \text{we have;}[/tex]

[tex]\dfrac{1}{y^2}\dfrac{dy}{dt}- \dfrac{1}{t}\dfrac{1}{y}= -\dfrac{1}{t^2}--- (i)[/tex]

[tex]Let \ v = \dfrac{1}{y}[/tex]

[tex]\dfrac{dv}{dt}= -\dfrac{1}{y^2}\dfrac{dy}{dt}[/tex]

[tex]-\dfrac{dv}{dt}= \dfrac{1}{y^2}\dfrac{dy}{dt}[/tex]

[tex]\text{replace in equation (1); we have}[/tex]

[tex]- \dfrac{dv}{dt}-\dfrac{1}{t}v = -\dfrac{1}{t^2}[/tex]

[tex]- \Big ( \dfrac{dv}{dt}+ \dfrac{1}{t}v \Big) = -\dfrac{1}{t^2}[/tex]

[tex]\dfrac{dv}{dt}+\dfrac{1}{t}v = \dfrac{1}{t^2}[/tex]

[tex]\text{relating above with} \dfrac{dv}{dt}+ P(t) v = Q(t) \text{, we have:}[/tex]

[tex]P(t) = \dfrac{1}{t} \ \ \ , \ \ \ \ Q(t) = \dfrac{1}{t^2}[/tex]

[tex]\mu (t) = e^{\int P(t) \ dt }= e ^{\int \dfrac{1}{t} \ dt}= e^{In|t|}= t[/tex]

[tex]v\mu(t) = \int \mu(t) Q(t) dt + C[/tex]

[tex]vt = \int (t) (\dfrac{1}{t^2})dt + C[/tex]

[tex]vt = \int \dfrac{1}{t}dt + C[/tex]

[tex]vt = Int+C[/tex]

[tex]v = \dfrac{In \ t + C}{t}[/tex]

[tex]\text{substitute } v = \dfrac{1}{y}}, we \ get}[/tex]

[tex]\dfrac{1}{y}=\dfrac{In \ t +C}{t}[/tex]

[tex]\mathbf{y = \dfrac{t}{In \ t + C}}[/tex]

I need some help please !

Answers

Answer:

With what?

Step-by-step explanation:

Write an expression to represent “7 less than 6 times a number n.”

Answers

Answer:

7 < 6n

Step-by-step explanation:

Answer:

6n-7

Step-by-step explanation:

7 Less = -7

6 x n = 6n

Combine an expression we get 6n - 7

The legend on a map states that 1 inch
is 250 miles. If you measure 3 inches
on the map, how many miles would
the actual distance be?

Answers

It would be 750 miles. 250*3=750
750 miles would be the answer of how many miles

The factors of x² and x and x - 5.

A. True

B. False ​

Answers

A.True

True hai

mujhe brainliest mark karde agar nahi kiya toh tujhe report kardunga

The answer is true




Hope this helps :)

need help with this tricky question. thanks

Answers

Answer:

E

Step-by-step explanation:

C. 4
GF is 6 so GE is 3
this is one of the pythagorean triples
which is 3,4,5
since there is already 3 and 5, length HE is 4

Can someone help me with a two step equatio that is x=2

Answers

Sure type it in comments

What is the slope of y = -x + 7?

Answers

Answer:

The slope is -1



A road is 3/5
of a mile long. A crew needs to repave 3/7
of the road. How long is the section that needs to be repaved?
Write your answer is simplest form.

Answers

Answer:

9/35

Step-by-step explanation:

3/5 x 3/7

If x=9 in what is the surface area of the geometric shape formed by this net?

Answers

Answer:

1134 in²

Step-by-step explanation:

Surface area is:

x²*2 + 3x*x*4 = 14x²

Substitute x:

14x² = 14*9² = 1134 in²

Cuanto es la rais cuadrada del rectángulo entre dos y multiplicada por 1837​

Answers

14,696

buen dia

(lo siento)

choose the right multiplacation equation that is correct A.16x6=22 B.16x6=636 C.16x6=96 D.16x6=123

Answers

Answer:

C. 16 · 6 = 96

Step-by-step explanation:

16 · 6 = 96, therefore option C is the correct choice :)

Answer:

The right multiplication equation that is correct is (C.16×6=96)

Help!! Find the area of the triangle.

Answers

Answer:

Area = 60.0 units²

Step-by-step explanation:

First, let's find the height of the triangle using Pythagorean Theorem:

Height = √(11² - 8²)

= √57

Height = 7.5 (nearest tenth)

✔️Find the area:

Area = ½*base*height

Base = 2*8 = 16

Height = 7.5

Plug in the values

Area = ½*16*7.5

Area = 60.0 units² (nearest tenth)

No it's not is 67 and 23

Answers

Answer:

What?

Step-by-step explanation:

I don't understand.

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