Question

Answer the following: A nurse in a large university (N = 30, 000) is concerned about...

Answer the following:

A nurse in a large university (N = 30, 000) is concerned about students' eye health. She takes a random sample of 75 students who don't wear glasses and finds 27 that need glasses.

A) Using your graphing calculator, find a 95% confidence interval for the proportion of students who need to wear glasses but don't. (Show all work, functions, and inputs on your calculator too)

B) The nurse wants to be able to estimate, with a 95% confidence interval and a margin of error of 6%, the proportion of students who need to wear glasses but don't. Find the necessary sample size (n) for this estimate.

C) The following school year, the nurse wants to construct the same 95% confidence interval for the proportion of students who need glasses but don't wear them, but she thinks the proportion has changed since last year. Without using the point estimate of the population proportion from the previous year, find the necessary sample size (n) for a 95% confidence interval for the population proportion with a margin of error (m) of 6%.

Thanks.

Homework Answers

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
Find the minimum sample size n necessary to estimate a population proportion p with a 95%...
Find the minimum sample size n necessary to estimate a population proportion p with a 95% confidence interval that has a margin of error m = 0.03.
A dean at a large state university (student population exceeds 40,000) is interested in determining the...
A dean at a large state university (student population exceeds 40,000) is interested in determining the proportion of students who receive some sort of financial aid. Rather than examine the records for all students, the dean randomly selects 200 students and finds that 118 of them are receiving financial aid. A. State the conditions that should be met to reliably estimate the proportion of students on financial aid using a confidence interval and explain whether or not they are met....
A college registrar wants to estimate the proportion of all students at the college who are...
A college registrar wants to estimate the proportion of all students at the college who are dissatisfied with the online registration procedure. What is the most conservative estimate of the minimum sample size that would limit the margin of error to be within 0.045 of the population proportion for a 95% confidence interval?
A consumer agency wants to estimate the proportion of all drivers who wear seat belts while...
A consumer agency wants to estimate the proportion of all drivers who wear seat belts while driving. What is the most conservative estimate of the sample size that would limit the margin of error to within 038 of the population proportion for a 99% confidence interval? Round your answer up to the nearest whole number. n=
In order to determine what proportion of desks in each classroom should be left handed, the...
In order to determine what proportion of desks in each classroom should be left handed, the administration wants to know what proportion of students at Hope College are left-handed. In a preliminary sample of 12 students, 2 of them are left handed. (A) If they want the quick-and-dirty 95% confidence interval for the true proportion of all students who are left-handed to have a margin of error of less than 3%, about how large of a sample will they need?...
DO NOT RESPOND UNLESS YOU INTEND TO ANSWER EACH QUESTION 1. A university dean is interested...
DO NOT RESPOND UNLESS YOU INTEND TO ANSWER EACH QUESTION 1. A university dean is interested in determining the proportion of students who receive some sort of financial aid. Rather than examine the records for all students, the dean randomly selects 200 students and finds that 118 of them are receiving financial aid. The 95% confidence interval for p is 0.59 ± 0.07. Interpret this interval. a. We are 95% confident that the true proportion of all students receiving financial...
How's the economy? A pollster wants to construct a 95 % confidence interval for the proportion...
How's the economy? A pollster wants to construct a 95 % confidence interval for the proportion of adults who believe that economic conditions are getting better. (a) A poll taken in July 2010 estimates this proportion to be 0.41 . Using this estimate, what sample size is needed so that the confidence interval will have a margin of error of 0.02 ? (b) Estimate the sample size needed if no estimate of p is available. Part 1 of 2 (a)...
4. Find the margin of error E. In a random sample of 151 college students, 84...
4. Find the margin of error E. In a random sample of 151 college students, 84 had part-time jobs. Find the margin of error E for the 95% confidence interval used to estimate the population proportion. Round your answer to four decimal places. Answer 0.0792 5. Find the minimum sample size required to estimate the population proportion p: Margin of error: 0.10; confidence level: 95%; from a prior study, is known to be 66%. 6. Find the minimum sample size...
1)A sample of size  is drawn from a population whose standard deviation is  Find the margin of error...
1)A sample of size  is drawn from a population whose standard deviation is  Find the margin of error for a  confidence interval for μ. 2)A researcher wants to construct a 98% confidence interval for the proportion of elementary school students in Seward County who receive free or reduced-price school lunches. What sample size is needed so that the confidence interval will have a margin of error of 0.09? 3)An Internet service provider sampled 540 customers and found that 55 of them experienced an...
5. Mean of 1500, standard deviation of 300. Estimating the average SAT score, limit the margin...
5. Mean of 1500, standard deviation of 300. Estimating the average SAT score, limit the margin of error to 95% confidence interval to 25 points, how many students to sample? 6. Population proportion is 43%, would like to be 95% confident that your estimate is within 4.5% of the true population proportion. How large of a sample is required? 7. P(z<1.34) (four decimal places) 8. Candidate only wants a 2.5% margin error at a 97.5% confidence level, what size of...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT