An automobile manufacturer sold 30,000 new cars, one to each of 30,000 customers, in a certain year. The manufacturer was interested in investigating the proportion of the new cars that experienced a mechanical problem within the first 5,000 miles driven. a) A list of the names and addresses of all customers who bought the new cars is available. Each customer from a simple random sample of 1,000 customers who bought one of the new cars was asked whether they experienced any mechanical problems within the first 5,000 miles driven. 400 customers from the sample reported a problem. Of the 400 customers who reported a problem, 140 customers, or 32.5%, reported a problem specifically with the power door locks. Explain why 0.35 should not be used to estimate the population proportion of the 30,000 new cars sold that experienced a problem with the power door locks within the first 5,000 miles driven.

Answers

Answer 1

Answer:

The reason that 0.35 should not be used to estimate the population proportion of the 30,000 new cars sold that experienced a problem with the power door locks within the first 5,000 miles driven is that 0.35 does not represent the sample proportion.

The correct sample proportion is 0.14 (140/1,000) and not 0.35 (140/400).  It is this that can be used to estimate the population proportion and not 0.35.

Step-by-step explanation:

a) Data and Calculations:

New cars sold by the automobile manufacturer = 30,000

Number of customers that the 30,000 new cars were sold to = 30,000

Simple random sample = 1,000 customers

Number of customers from the SRS that reported a problem = 400

This is equal to 40% of the sample (400/1,000 * 100)

Proportion of customers who reported a problem (specifically) with the power door locks = 140/400 = 0.35

Proportion of customers out of the sample that reported specifically a problem with the power door locks = 140/1000 = 0.14.


Related Questions

Which expression has exactly two terms

4n
Ab2
5y2
3x5

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The expression 5 y 2 has exactly two terms

Answer: 3x +5

Step-by-step explanation:

I did it


Help! Please Help lol

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Rise over run, the slope is m=3/3 so y=3/3x+3, it’s +3 because that is where the y intercept is

Using a standard deck of 52 cards, what is the probability of getting 2 cards that are kings if you pull one card at a time and replace them? (HOW DID YOU GET YOUR ANSWER PLEASE SHOW YOUR WORK!!)
A. 12
B. 1/169
C. 11 1/8
D. 60%
E. 0.5
F. 2/112
G. 25%
H. 0.25
I. 25

Answers

Answer:

i dont knw

Step-by-step explanation:

Answer:

B,C,D

Step-by-step explanation:

I'm not honestly sure I'm sorry if it's wrong

21 miles equal how many feet

Answers

Answer:

110, 880 feet

Step-by-step explanation:

5,280 feet in one mile x 21 miles

Answer:

110, 880 feet

Step-by-step explanation:

Which angle pairs are supplementary? Check all that
apply.
3
6
4
5
21 and 22
0 24 and 23
24 and 25
27 and 25
23 and 26
2.
7 8

Answers

Answer:

Option B, C and E are supplementary angles.

Step-by-step explanation:

We need to find supplementary angles.

Supplementary angles are those angles who sum up to 180 °.

I have attached picture for reference.

Looking at the figure given:

We have supplementary angles:

∠4 and ∠3∠4 and ∠5∠5 and ∠6∠7 and ∠8∠3 and ∠6

But the options given are: ∠4 and ∠3,∠4 and ∠5, ∠3 and ∠6

So, Option B, C and E are supplementary angles.

The angle pairs that are supplementary are <4 and 3, <4 and 5 and <3 and <6.

What are supplementary angles?

A supplementary angle is an angle that add up to 180 degrees. For example 100 and 80 degrees are supplementary angles.

To learn more about supplement angles, please check: https://brainly.com/question/2766460

At one​ store, Alex saved ​$10 with a coupon for 50​% off her total purchase. At another​ store, the ​$28 she spent on books is 56​% of her total bill. How much did Alex spend in all at the two​ stores?

Answers

Your total would be $30 sit on my butt bubble

i can’t seem to find any answers for this can anyone help?

Answers

Answer:

2 2/3

Step-by-step explanation:

- - is the same as + so it's actually 2 1/3 + 5

A game decreased in price by 1/6
After the reduction it was priced at £75.
What was the original price of the game?

Answers

Imagine you didn’t know what it was priced after the reduction. Use “y” as the original number since we don’t know: y times (1-1/6) = 75
it is 1 minus 1 over 6 since you aren’t finding the price after reduction. Your finding the original one which means you need to minus by one (6 over 6= 1) so u would do 1 - 1/6
So if you do it the other way round it would be 75 divided by 1 minus 1 over 6
Which gives us 90!!

Plz I will give brainliest

Answers

Answer:

its yellow

Step-by-step explanation:

i am not sure answer is A remember not sure

What’s the surface area in square units if right I’ll mark brainleiest

Answers

Answer:  349 square units

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

Work Shown:

L = 5.5 = lengthW = 5 = widthH = 14 = height

SA = surface area of rectangular prism

SA = 2*(L*W + L*H + W*H)

SA = 2*(5.5*5 + 5.5*14 + 5*14)

SA = 2*(27.5 + 77 + 70)

SA = 2*(174.5)

SA = 349

The surface area is 349 square units.

Answer:

The answer is 349

Step-by-step explanation:

154+140+55=349

ill give brainliest if correct

Answers

C because if you divide 3/12 you get .25 but 4/18 is .22, which is the better deal

Answer:

no its A. kramer sells apples for $0.22 each

Step-by-step explanation:

A researcher wants to determine if college students typically drink more than 3 times per week. She collects data on 125 college students. From the sample, she finds that they drank an average of 3.5 times per week, with a standard deviation of 2.3 drinks. Use a 5% significance level for any testing. Based on the scenario above, which of the following is TRUE regarding the type of test that would need to be performed?

a. It is a two-tailed test.
b. It must be completed using the critical value approach.
c. It is a one-tailed test.
d. We reject the null and prove our claim.
e. We would need to estimate the significance level from the data.
f. Hypothesis testing cannot be performed on percentages.

Answers

Answer:

C: It is a one-tailed test.

Step-by-step explanation:

We are told the researcher wants to determine if college students typically drink more than 3 times per week.

This means the null hypothesis is;

H0: μ ≥ 3

this indicates that it's a one tailed test as the null hypothesis is only to the right side of 3 and thus just one tail.

This question will be solved using p-value approach since we are given population mean, sample mean, sample size and standard deviation.

We can't reject the null without finding out the p-value and seeing if it is less than the significance value given.

Hypothesis testing can be done done proportions or percentages.

Thus, the correct option is one-tailed test.

What is the total surface area of the square pyramid in square inches? *
11
11.5
7

Answers

Answer:

base edge? height?

Surface area of a square pyramid:

s = length of base edge.

h = height of pyramid from base to top.

A = surface area.

[tex] A \: = s² + 2s \sqrt{\frac{a^{2}}{4}+h^{2}}[/tex]

√ = square root, root of 2, opposite of square.

² = square, power of 2, times itself once.

√n × √n = n

n × n = n²

PLEASE HELP!!!: Parallel lines 1 and m are intersected
by transversal t as shown below. Which
of the following angles are alternate
interior angles?

Answers

The answer is B because if you add the to angles together you create a straight line.

how many legs are there in 5 dogs and 7 birds​

Answers

Dog has 4 legs and bird has 2 legs

The 5 for dogs which is 5 ×4 =20

And 7for birds which is 7×2=14

The whole answer is 20+14 =34 legs in both animals

A cyclist rides her bike at a speed of 12 miles per hour. What is this speed in kilometers per hour? How many kilometers will the cyclist travel in 5 hours? In your computations, assume that 1 mile is equal to 1.6 kilometers. Do not round your answers.


PLS HELP

Answers

Answer:

answers below :)

Step-by-step explanation:

Hi there!

with a ratio of 1:1.6, we can find these answers.

1. 19.2 km, multiply 12 by 1.6

2. 96. km, multiply 12 by 6 to find the total amount of miles traveled, then

multiply 60 by 1.6 to get 96.

I hope this helps!

Dairy farmers are aware there is often a linear relationship between the age, in years, of a dairy cow and the amount of milk produced, in gallons per week. The least-squares regression line produced from a random sample is . Based on the model, what is the difference in predicted amounts of milk produced between a cow of 5 years and a cow of 10 years

Answers

Complete question :

Dairy farmers are aware there is often a linear relationship between age, in years, of a dairy cow in the amount of milk produced, in gallons per week. The least squares regression line produced from a random sample is milk=40.8-1.1(Age). Based on the model, what is the difference in predicted amounts of milk produce between a cow of five years in a cow of 10 years?

Answer:

A cow of five years is predicted to produce 5.5 more gallons of milk per week.

Step-by-step explanation:

Given the regression model :

milk=40.8-1.1(Age)

Milk produced by 5 year old cow using the model :

Milk produced = 40.8 - 1.1(5)

Milk produced = 40.8 - 5.5

Milk produced = 35.3

Milk produced by 10 year old cow using the model :

Milk produced = 40.8 - 1.1(10)

Milk produced = 40.8 - 11

Milk produced = 29.8

Difference in volume of milk produced :

Age 5 milk producrion- Age 10 milk production :

35.3 - 29.8

= 5.5

Answer:

Answer B

Step-by-step explanation:

The difference of 5 years produces a 5.5 gallon per week difference in favor of the younger cow.

Is graphite all of the following?

Pure substance
Element
Compound
And Molecule

Pls help asap

Answers

Answer: Yes!

Step-by-step explanation:

Yes, graphite is composed of 100%carbon. With this, can we say that graphite is an element or compound of carbon? Compound is composed of two or more elements combined in a substance in definite proportions, in the form of molecules held together by chemical bonds.

Sam has 35 rubbers.He wants to share them equally between 3 of his friends .How many will each friend receive?How many are left over?

Answers

Answer:

11 will be shared out and there will be 2 rubbers left.

Step-by-step explanation:

the last number that 3 goes into before 35 is 33. 33 ÷ 3 = 11. So each friend gets 11 rubbers. then from 33, there will be 2 rubbers left.

What is the volume of the rectangular prism shown?

Answers

Answer:

18 3/64

Step-by-step explanation:

i did test trust me

Given this equation y = x2 + 2x -5 , Find the average rate of change over the interval 2 ≤ x ≤ 4 ?

Answers

Answer:

The average rate of change is 8.

Step-by-step explanation:

We are given the equation:

[tex]y=x^2+2x-5[/tex]

And we want to find the average rate of change on the interval [2, 4].

When finding the average rate of change, we essentially find the endpoints and then find the slope between them.

So, the endpoints are:

[tex]y(2)=(2)^2+2(2)-5=3[/tex]

And:

[tex]y(4)=(4)^2+2(4)-5=19[/tex]

So, the average rate of change between them is:

[tex]\displaystyle m=\frac{19-3}{4-2}=\frac{16}{2}=8[/tex]

Add.
(2x - 7) + (3x - 1)
O A. 5x - 8
B. 5x + 8
O C. 5x-6
D. 5x + 6

Answers

Your answer is B. 5x+8

1) All cars are blue. (2) All pigs have wings. Therefore, (3) All buses have three wheels. Question 2 options: Passes the true premises test and passes the proper form test. Passes the true premises test and fails the proper form test. Fails the true premises test and passes the proper form test. Fails the true premises test and fails the proper form test. None of the above.

Answers

Answer:

Fails the true premises test and fails the proper form test

Explanation:

A valid argument must pass the true premises test and the proper form test.

True premises test checks to see if what the premises is saying is true about the world, example- pigs do not have wings and so the argument fails the true premises test. Proper form test assumes the premises is true and then checks to see if a valid conclusion was drawn based on the premises(even though it might fail the true premises test and may not be true about the world)

1. Write the linear equation for a line with a slope of 1/2 that goes through the point (-1,
0).

Answers

Answer:

uhuhhubuggyugyug

uiyuyuh

jhjhh

Step-by-step explanation:

y7gukgyfkjiyfikyutgikuygtujki

Are the two triangles above similar? Why or why not?

A. Yes, they are similar by the AA similarity postulate.

B. Yes, they are similar by the SAS similarity theorem.

C. No, there is not enough information given to prove similarity.

D. No, right triangles are never similar.

Answers

Answer: I think - D
Hope this helps :))

No, Triangles with one congruent angle are never similar so the correct option is D.

What is similar triangle?

Similar triangles are triangles that have constant form, however their sizes might vary. All equal triangles, squares of any aspect lengths are samples of similar objects. In other words, if 2 triangles are similar, then their corresponding angles are congruent and corresponding sides are in equal proportion.

For AAA similarity postulate; Two triangles are similar if two corresponding angles of them are of same measure. It is because when two pairs of angles are similar, then as the third angle is fixed if two angles are fixed, thus, third angle pair also gets proved to be of same measure.

If the triangles, have only 1 congruent angles , it can not be said similar because for a triangle to be similar , minimum two criteria must be equal .

Hence we can conclude that triangles with one congruent angle are never similar.

To know more about similar triangles , visit:

brainly.com/question/14285697

#SPJ5

Please help quick!
Subtracting a number is the same as adding its opposite.
Use this understanding to complete each of the equations below.

Enter numbers to evaluate −5−(−7).

‐5 –(‐7)= ‐5 + _______

= ________

Enter numbers to evaluate −5−7.

‐5− 7 = ‐5 + _______

= ________

Answers

Answer:

-5+7

=2

-5+-7

=-12

Step-by-step explanation:

It is the same thing with adding its opposite(aka change its sign so addition is being imply)

Simplify the expression.
- 2.6f +0.2f - 15 - 3
i need help with this, anyone?

Answers

Answer: -2.4f-18

Step-by-step explanation:

Add 0.2f to -2.6f then subtract 3 from -15

THIS IS URGENT IT IS DUE TODAY I NEED IT FAST, I ONLY NEED THE STEPS NOT THE ANSWER SO PLEASE SOMEONE HELP ME IT WOULD BE MUCH APPRIECIATED.

Answers

Does that help? Because don’t get the questions

HHHEEEeLLLPPPP MMEEe

Answers

v = 4/3 × 3.14×r^3

=4/3×3.14× (1.5)^3

= 14.13

Identify as an increase or decrease. Then find the percent of increase or decrease. If necessary, round to the nearest percent.

Original: 150

New: 130

Answers

Answer:

130 is a 13.333%  or 13% decrease of 150.

Other Questions
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