Question

1. If you want a poll to have a margin of error of 2.89%, how large will your sample have to be? Round your answer to the nearest whole number.

____ people

2.

You want to obtain a sample to estimate a population proportion. At this point in time, you have no reasonable preliminary estimation for the population proportion. You would like to be 80% confident that you estimate is within 2% of the true population proportion. How large of a sample size is required?

n =

3. You want to obtain a sample to estimate a population proportion. At this point in time, you have no reasonable preliminary estimation for the population proportion. You would like to be 95% confident that you estimate is within 4.5% of the true population proportion. How large of a sample size is required? Do not round mid-calculation.

n =

4.

You want to obtain a sample to estimate a population proportion. Based on previous evidence, you believe the population proportion is approximately p*=89%p*=89%. You would like to be 99.5% confident that you estimate is within 2.5% of the true population proportion. How large of a sample size is required?

n =

Do not round mid-calculation. However, use a critical value accurate to three decimal places.

5.You want to obtain a sample to estimate a population proportion. Based on previous evidence, you believe the population proportion is approximately 36%. You would like to be 99% confident that your estimate is within 4.5% of the true population proportion. How large of a sample size is required? Do not round mid-calculation.

n =

6. You want to obtain a sample to estimate a population proportion. Based on previous evidence, you believe the population proportion is approximately p∗=83%p∗=83%. You would like to be 98% confident that your estimate is within 4% of the true population proportion. How large of a sample size is required?

n =

Answer 1