An automobile manufacturer claims that its car has a 37.2 miles/gallon (MPG) rating. An independent testing firm has been contracted to test the MPG for this car since it is believed that the car has an incorrect manufacturer's MPG rating. After testing 120 cars, they found a mean MPG of 37.1. Assume the standard deviation is known to be 1.1. A level of significance of 0.05 will be used. Make a decision to reject or fail to reject the null hypothesis.

Answers

Answer 1

Answer:

fail to reject the null hypothesis

Step-by-step explanation:

Based on the information provided I would fail to reject the null hypothesis. This is because the Miles per gallon that the independent testing firm has concluded for the car nearly matches the car's MPG claim. The difference being 0.1 . Since the standard deviation is 1.1 for this test, this means that the average falls perfectly within this range and makes the data very compelling. Combine this with a very low level of significance, I would say that the claim is backed by the data.


Related Questions

6-6-6-6-6-6-6-6--y50-60976-09-7697967-676-796-790696 6x3


some one help me with these questions (totally not starting a meme)

Answers

Answer:

meme also I don't think you can answer that considering that is a hotlogic oven serial number  

Step-by-step explanation:

Hello hello hello hello hello hello hello hello

-Let g(x) be a function defined by g(x) = x3.
a) Sketch the graph of g(x).
b) Find the inverse g-1(x) of g(x) then sketch the graph of g-1(x). c) Specify the domain and range of g(x) and g-1(x).
d) Determine the end behavior of g(x) and g-1(x).

Answers

Answer:

Step-by-step explanation:

a) The graph rises steeply from the third quadrant  and there is a point of inflection through  the origin (0, 0) then rises steeply in quadrant 1.

b) Let y = g(x) = x^3

x = ∛y

So g(-1)x = ∛x.

The graph is the reflection of g(x) in y = x.

c) Domain of g(x) = All real x, Range is all real g(x).

Domain of  g(-1)x  = All real x, Range = all real g-1(x).

d) You will see the end behaviour from the graphs.

I tried to send you a link to the graphs but the system wont allow it.

Find the Area Please​

Answers

7.2x10=72
This should be the correct answer

7+x/5=-4whats the answer​

Answers

Answer:

-55

Step-by-step explanation:

7+x/5=-4

Subtract 7 from both sides

x/5 = -11

multiply both sides by 5

x = -55

x = -55
Hope this helps!

P(A and B)
Hint:
Find P (Senior Boy)
P(B)
Classroom of Students
Boys Girls
Freshman 4
4 8
Sophomore 5 7 12
[?]
Junior 2 3 5
Senior 1
4 5
12 18
Please help :(

Answers

Answer:

[tex]\frac{1}{12}[/tex]

Step-by-step explanation:

Number of boys = 12

Number of girls = 18

Total number of students = 12 + 18 = 30

Probability refers to chances of occurrence of any event.

Probability = Number of favorable outcomes ÷ Total number of possible outcomes

To find P(Senior | Boy), use [tex]P(A|B)=\frac{P(A\,\,and\,\,B)}{P(B)}[/tex]

P(Senior and Boy) = [tex]\frac{1}{30}[/tex]

P(Boy) = [tex]\frac{12}{30}[/tex]

So,

P(Senior | Boy) = P(Senior and Boy) ÷ P(Boy) = [tex]\frac{\frac{1}{30} }{\frac{12}{30} } =\frac{1}{12}[/tex]

Answer:

1/12

Step-by-step explanation:

Golf balls cost $0.90 each at Emma’s Club, which has an annual $25 membership fee. At Wendy & Marilyn’s sporting goods store, the price is $1.35 per ball for the same brand. Where you should buy your golf balls depends on how many you wish to buy. Explain, and illustrate your reasoning by drawing a graph.

Answers

I can give you the equations for the graph. First one would be y = 0.90x + 25 (25 being the y intercept) and the other one would simply be y = 1.35. If you have a graphing calculator like me you can use it when modeling the graph. Hopefully this helps!

Answer:

Gjjjjjjjjjjjjjjjjo

Step-by-step explanation:

Jkk

The speed of the current in the river is 4 mph about travel 17 miles downstream with the current in the this river in the same time that it travels 9 miles upstream against the current find the speed of the boat in the Stillwater

Answers

Answer:

Step-by-step explanation:

b = speed of boat in still water

traveling downstream, the boat goes (b+4 miles)/hour.

traveling upstream the boat goes (b-4 miles)/hour.

Time to travel 17 miles downstream = 17 miles × (1 hour)/(b+4 miles)

Time to travel 9 miles upstream = 9 miles × (1 hour)/(b-4 miles)

17 miles × (1 hour)/(b+4 miles) = 9 miles × (1 hour)/(b-4 miles)

17/(b+4) = 9/(b-4)

cross-multiply denominators:

17(b-4) = 9(b+4)

17b - 68 = 9b + 36

8b = 104

b = 13 miles per hour

Alice has 2 pennies, 3 nickels, 4 dimes, 4 quarters and 1 loonie in her pocket. If one coin is drawn randomly, what is the theoretical probability of getting a quarter?

Answers

Answer: 4/14

Step by step: there are 14 coins and only 4 quarters so 4/14

What is the equation of the polynomial function shown on the graph?

Answers

Answer:

-(x+4)(x+1)(x-3).

Step-by-step explanation:

Let find the roots of the polynomial function. Roots are the x intercept( what is the value of x when y=0)

The roots are -4,-1,and 3. We can represent that as

(x+4)(x+1)(x-3)

This is a negative polynomial so we will reflect it across the x axis by putting a negative sign in front of the roots.

-(x+4)(x+1)(x-3).

cual es el número de una deuda de $80.000​

Answers

se paga 36,000

Step-by-step explanation:

espero te ayude

A researcher gathers a sample of n=89 people to try a new
type of therapy and to compare the sample to the
population mean of m=23. The sample means for
depression after treatment was =24 with a standard
deviation of s=3. Using this information, what is the mean
for the distribution of sample means used for this study?
Round your answer to 2 decimal places if appropriate.

Answers

Answer:

24

Step-by-step explanation:

+#;$;_;_:;+$hshshsbbsns

a town has a population of 70,230 in the year 2020. Over the next five years, 6556 people move into the town for work, but 4096

Answers

Answer:

63,674

Step-by-step explanation:

70,230-6556

=63,674

A boy runs a distance of 200km in 25seconds. What is his average speed

Answers

Answer:

8 km average speed

Step-by-step explanation:

Answer:

His average speed is 28,800 km per hour.

Step-by-step explanation:

He runs 480 km per minute. Then I multiply 480 by 60 to get 28,800 km.

:))

Suppose you are buying apples and bananas. The price of apples is $0.40 each and
the price of bananas is $0.25 each. Which equation models the number of apples and
bananas you can buy for $2?
a. 40x + 25y = 200
b. 40x – 25y = 2
C. 5x + 8y = 200
d. 5x + 8y = 2

Answers

Answer:

D

Step-by-step explanation:

This figure consists of a rectangle and a quarter circle.


What is the perimeter of this figure?


Use 3.14 for π.




Enter your answer as a decimal in the box.


cm

Answers

Answer:

75.27

Step-by-step explanation:

Rectangle = 20+2+2+20-11=47

quarter circle = 1/4(2)(11)(3.14)=17.27 + 11 = 28.27

47+28.27=75.27

Answer:

75.27.cm

Step-by-step explanation:

it works i got a 100 on the test

Does anyone know how to do this? They all are either add, subtract, multiply, divide, square, or square root besides the 4th sentence. The 4th sentence is either perfect square of a binomial, linear equation, or quadratic equation in standard form

Answers

Answer:

Square, multiply b, add, quadratic equation

Step-by-step explanation:

An outdoor art display is a metal cube with edge length 36 feet. What is the volume of the cube in cubic​ feet? Type your answer without any spaces or commas will mark brainliest if right

Answers

Answer:

46656ft^3

Step-by-step explanation:

I think this would be it but not 100% so sorry if im wrong

Find the vertex of the graph of the quadratic function f(x)=7x2+14x+10

Answers

Answer:

plazzz get lost bro fast

HELP THIS IS DUE TODAY

Answers

Answer:

slope=0

Step-by-step explanation:

Conceptually, y never changes, which means the line is a straight horizontal line.

Mathematically, slope is the change in y over the change in x. For example, if we use the first 2 points:

[tex]\frac{2-2}{1-3} =\frac{0}{-2} =0[/tex]

Because 0 divided by anything is still 0.

What is the product of the rational expressions shown below ? Make sure your answer is in reduced form. Photo included . Multiple choice .

Answers

Answer:

( 1/x-5)*8x

(1*8x)/(x-5)

8x/x-5

Using the formula Ft = mv - mu , find v , when F= 55, u= -9, t= 3, m=5

Answers

Answer:

v = 24

Step-by-step explanation:

Ft + mu = mv

v = (Ft + mu)/m = (55*3 + 5*(-9))/5 = 24

simplify the expression 4x+2-1/2x

Answers

Answer:

7/2 x  + 2

Step-by-step explanation:

4x+2−

1

2

x

The function f(x) = 3/4(10)–x is reflected across the x-axis to create the function g(x). Which ordered pair is on g(x)?

Answers

Answer:

u already have the answer

Answer:

For people that can't see the picture it's

C (2,-3/400) third option

Step-by-step explanation:

NEED HELP ASAP!!!!!!!

Answers

Step-by-step explanation:

It's must be -3 ...............

A gym teacher placed golf balls into 9
buckets so that each bucket had at least 15
balls. How many total golf balls are there?

Answers

Answer:

135

Step-by-step explanation:

9 x 15 = 135

The total number of the golf ball in all buckets is 135 balls using multiply system

Multiply based problem:

What information do we have?

Number of buckets = 9

Number of golf ball in each bucket = 15

Total number of golf ball in all buckets = Number of buckets × Number of golf ball in each bucket

Total number of golf ball in all buckets = 9 × 15

Total number of golf ball in all buckets = 135 balls

Find out more information about 'Number of ball'.

https://brainly.com/question/9015557?referrer=searchResults

The expression below represents the vertical height above the ground, in meters, of a roller coaster when it is x meters away from the starting station.

x^2+6x=15

Which statement best describes the term 15?


the maximum height of the roller coaster

the horizontal distance from the station when the roller coaster is at its maximum height

the velocity of the roller coaster

the initial height of the roller coaster

Answers

Answer:

D.) the initial height of the roller coaster

Step-by-step explanation:

Answer:

the initial height of the roller coaster

Step-by-step explanation:

help ASAP please !!

Dorise is cutting a piece of fabric to use as a section of a patchwork quilt. A pattern of the quilt section is shown below.



*Picture not drawn to scale

What is the area of section A?
A.
28.5 square inches
B.
49 square inches
C.
24.5 square inches
D.
14 square inches

Answers

C. 1/2b*h 1/2(7)*7= 24.5

Answer:

24.5

Step-by-step explanation:

PLEASE HELP MUST BE AT LEAST 5 SENTENCES PLEASE HELP DUE IN 5 MINS

Answers

Answer:

The Liberty Tree (1646–1775) was a famous elm tree that stood in Boston near Boston Common, in the years before the American Revolution. The tree became a rallying point for the growing resistance to the rule of Britain over the American colonies, and the ground surrounding it became known as Liberty Hall. By hanging the noose there it is symbolizing liberty and justice is served.

Step-by-step explanation:

please mark brainliest, I hope this helps

15% of the students in the library have brown eyes. If there are 9 students with brown eyes, How many students are in the library

Answers

Answer:

Step-by-step explanation:

Answer:

60

Step-by-step explanation:

ENGLISH

If you Multiply 9x100 you get 900 then you divide 15 divided by 900 is 60

SPANISH

Si multiplica 9x100 obtiene 900, entonces divide 15 dividido por 900 es 60

Hope this will help you

Melissa made a school banner that is 3 yards long in a 11 over 12 yards wide what is the area of the banner

Answers

Answer:

2 3/4

Step-by-step explanation:

So area is just base X height

3 X 11/12

2 3/4

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