ZuoTi.Pro
Question

Clarence wants to estimate the percentage of students who live more than three miles from the...

Clarence wants to estimate the percentage of students who live more than three miles from the school. He wants to create a 98% confidence interval which has an error bound of at most 4%. How many students should be polled to create the confidence interval?

z0.10 z0.05 z0.025 z0.01 z0.005

1.282 1.645 1.960 2.326 2.576

Use the table of values above. Provide your answer below:

math   Statistics-And-Probability   
0 0
Add a comment Improve this question Transcribed image text
Next > < Previous
Sort answers by oldest

Homework Answers

Answer #1

As here value of p is not given we will use p=0.5

Further for 98% CI z value is 2.326 as P(-2.326<z<2.326)=0.98

Also given that E=0.04

So we will find n using formula of E

So

0 0
Add a comment
Know the answer?
Add Answer to:
Clarence wants to estimate the percentage of students who live more than three miles from the...
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for? Ask your own homework help question. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions

  • Suppose the manager of a shoe store wants to determine the current percentage of customers who...

    Suppose the manager of a shoe store wants to determine the current percentage of customers who are males. How many customers should the manager survey in order to be 95% confident that the estimated (sample) proportion is within 10 percentage points of the true population proportion of customers who are males? z0.10:1.282 z0.05: 1.645 z0.04: 1.751 z0.025: 1.960 z0.01: 2.326 z0.005: 2.576 Use the table of values above. Provide your answer below:

  • Suppose the manager of a shoe store wants to determine the current percentage of customers who...

    Suppose the manager of a shoe store wants to determine the current percentage of customers who are males. How many customers should the manager survey in order to be 99% confident that the estimated (sample) proportion is within 7 percentage points of the true population proportion of customers who are males? z0.10 z0.05 z0.04 z0.025 z0.01 z0.005 1.282 1.645 1.751 1.960 2.326 2.576 Use the table of values above. Provide your answer below:

  • Uan wants to estimate the percentage of people who will vote for issue A on the next election. He...

    uan wants to estimate the percentage of people who will vote for issue A on the next election. He surveys 150 Individuals and finds that 81 will vote for issue A. Find the margin of error for the confidence interval for the population proportion with a 90% confidence level. Z0.10 Z0.05 0.0251 z0.01 0.005 1.2821 1 :645| 1.960||2.326|2.576 Use the table of common z-scores above. Round the final answer to three decimal places uan wants to estimate the percentage of...

  • Suppose scores of a standardized test are normally distributed and have a known population standard deviation...

    Suppose scores of a standardized test are normally distributed and have a known population standard deviation of 8 points and an unknown population mean. A random sample of 25 scores is taken and gives a sample mean of 93 points. Find the margin of error for a confidence interval for the population mean with a 98% confidence level. z0.10 z0.05 z0.025 z0.01 z0.005 1.282 1.645 1.960 2.326 2.576 You may use a calculator or the common z values above. Round...

  • Question Using the information from above, with p′=0.143, q′=0.857, and n=350, what is the 95% confidence...

    Question Using the information from above, with p′=0.143, q′=0.857, and n=350, what is the 95% confidence interval for the proportion of the population who play games on their phones? z0.10 z0.05 z0.025 z0.01 z0.005 1.282 1.645 1.960 2.326 2.576 Use the table of common z-scores above. Round the final answer to three decimal places. Provide your answer below:

  • The lengths of text messages are normally distributed with a population standard deviation of 3 characters...

    The lengths of text messages are normally distributed with a population standard deviation of 3 characters and an unknown population mean. If a random sample of 27 text messages is taken and results in a sample mean of 22 characters, find a 98% confidence interval for the population mean. Round your answers to two decimal places. z0.10 z0.05 z0.04 z0.025 z0.01 z0.005 1.282 1.645 1.751 1.960 2.326 2.576 You may use a calculator or the common z-values above.

  • The length, in words, of the essays written for a contest are normally distributed with a...

    The length, in words, of the essays written for a contest are normally distributed with a population standard deviation of 442 words and an unknown population mean. If a random sample of 24 essays is taken and results in a sample mean of 1330 words, find a 99% confidence interval for the population mean. z0.10 z0.05 z0.025 z0.01 z0.005 1.282 1.645 1.960 2.326 2.576 You may use a calculator or the common z values above. Round the final answer to...

  • Suppose the speeds of vehicles traveling on a highway are normally distributed and have a known...

    Suppose the speeds of vehicles traveling on a highway are normally distributed and have a known population standard deviation of 7 miles per hour and an unknown population mean. A random sample of 32 vehicles is taken and gives a sample mean of 64 miles per hour Find the margin of error for the confidence interval for the population mean with a 98% confidence level Z005 Z0.025 Z0.0 Z0.005 0.10 1.282 1.645 1.960 2.326 2.576 You may use a calculator...

  • a)A university planner wants to determine the proportion of spring semester students who will attend summer...

    a)A university planner wants to determine the proportion of spring semester students who will attend summer school. Suppose the university would like a 0.90 probability that the sample proportion is within 0.195 or less of the population proportion.What is the smallest sample size to meet the required precision? (There is no estimation for the sample proportion.)  (Enter an integer number.) b)A university planner wants to determine the proportion of spring semester students who will attend summer school. She surveys 31 current...

  • A public relations manager for the Cincinnati Reds wants to determine the percentage of local college...

    A public relations manager for the Cincinnati Reds wants to determine the percentage of local college students who attended a Reds baseball game at Great American Ballpark during the 2016 season. A sample of 648 students who are enrolled at a college or university within 25 miles of the Reds ballpark was asked whether or not they attended at least one Cincinnati Reds game during the 2016 season. Out of the 648 students asked, 246 had attended a game during...

ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT