1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Doss [256]
3 years ago
7

An automotive manufacturer wants to know the proportion of new car buyers who prefer foreign cars over domestic. Step 2 of 2 : S

uppose a sample of 1418 new car buyers is drawn. Of those sampled, 354 preferred foreign over domestic cars. Using the data, construct the 99% confidence interval for the population proportion of new car buyers who prefer foreign cars over domestic cars. Round your answers to three decimal places.
Mathematics
1 answer:
son4ous [18]3 years ago
7 0

Answer: 99% confidence interval would be (0.13,0.26).

Step-by-step explanation:

Since we have given that

Sample size n = 1418

x = 354

So, \hat{p}=\dfrac{x}{n}=\dfrac{354}{1418}=0.249

At 99% level of significance, z = 2.58

So, interval would be

\hat{p}\pm z\sqrt{\dfrac{p(1-p)}{n}}}\\=0.249\pm 2.58\times \sqrt\dfrac{0.249\times (1-0.249)}{1418}}}\\\\=0.249\pm 0.01148\\\\=(0.249-0.01148,0.249+0.01148)\\\\=(0.13,0.26)

Hence, 99% confidence interval would be (0.13,0.26).

You might be interested in
2 1/2 x 3 1/5 fast please
vova2212 [387]

Step-by-step explanation:

<u>Let's turn each mixed fraction into an improper fraction:</u>

2 \frac{1}{2} =\frac{2}{2} +\frac{2}{2} +\frac{1}{2} =\frac{5}{2}

3\frac{1}{5} =\frac{5}{5} +\frac{5}{5} +\frac{5}{5} +\frac{1}{5} =\frac{16}{5}

<u>Multiply:</u>

\frac{5}{2} \times \frac{16}{5} =\frac{80}{10}

<u>Simplify:</u>

\frac{80 \div 10}{10 \div 10} =\frac{8}{1} =8

8 is your simplified product.

4 0
3 years ago
Which model represents −8 + 3
pychu [463]

C will be the answer... its ur boi C bandzzzzzzz

8 0
3 years ago
Help in class ez rly ez
KiRa [710]

Answer:

The slope is 4x

The y-intercept is -5

Slope-intercept form = y = 4x - 5

Step-by-step explanation:

I hope this helps.

8 0
2 years ago
Read 2 more answers
PLEASE ANSWER ASAP!!!!!!!!!!!! MUCH APPRECIATED!!
Salsk061 [2.6K]

The equation that's illustrated simply depicts an investment as it shows the principal, and interest rate.

<h3>What is an investment?</h3>

It should be noted that an investment simply means a dedication of an asset in order to increase the value over a period of time.

In this case, the equation that's illustrated simply depicts an investment as it shows the principal, and interest rate. To calculate the investment, the time, amount and rate will be considered.

Learn more about investment on:

brainly.com/question/25300925

#SPJ1

3 0
2 years ago
Recall that a right triangle is a triangle with one right angle. One angle of a triangle measures 89.99°. Can the triangle be a
Anastasy [175]
Yes because the right triangle has a right angle which will equal to 90° you can place 89.99 to the nearest whole number which will give you a right angle.
7 0
3 years ago
Other questions:
  • What are the solutions to the following system of equations?<br> y = x2 + 12x + 30<br> 8x – y = 10
    13·1 answer
  • Easy math question please help
    10·2 answers
  • Can someone help me with this ​
    12·1 answer
  • Which of these pairs are like terms?<br><br> 17, 3x<br> 20x, 0.8x<br> 0.5x, 0.5y<br> 14x, 14
    13·2 answers
  • If a triangle has 3 side one is 12 one is 72 what is the last sude
    9·2 answers
  • What is the total amount that will be repaid if the loan described is paid in 2 years?
    15·1 answer
  • Jane spent 3 hours exploring a mountain with a dirt bike. First, she rode 48 miles uphill. After she reached the peak she rode f
    6·1 answer
  • Last time even if u have to put it in the comments <br> Anybody else wants to hangout me
    13·1 answer
  • It took 5 builders 3 and a half hours to build a wall
    12·2 answers
  • Which is bigger -32 or 13.8?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!