You want to obtain a sample to estimate the proportion of a population that possess a particular genetic marker. Based on previous evidence, you believe approximately p*= 23% of the population have the genetic marker. 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 = Do not round mid-calculation. However, you may use a critical value accurate to three decimal places.

You want to obtain a sample to estimate a population proportion. Based on previous evidence, you believe the population proportion is approximately p∗=80%p∗=80%. You would like to be 95% confident that your esimate is within 2% 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.

You want to obtain a sample to estimate a population proportion. Based on previous evidence, you believe the population proportion is approximately p*=33%p*=33%. You would like to be 99% confident that your estimate is within 0.1% 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.

You want to obtain a sample to estimate a population proportion. At this point in time, you have no reasonable estimate for the population proportion. You would like to be 90% confident that your estimate is within 3% of the true population proportion. How large of a sample size is required?n = Do not round mid-calculation. However, use of a critical value rounded to three decimal places will suffice.

You want to obtain a sample to estimate a population proportion. Based on previous evidence, you believe the population proportion is approximately p∗=58%p∗=58%. You would like to be 99.5% confident that your esimate is within 3% 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.

You wish to estimate the average weight of a mouse. You obtain 10 mice, sampled uniformly at random and with replacement from the mouse population. The weights are 21, 23, 27, 19, 17, 18, 20, 15, 17 and 22 grams. How many mice would you need to reduce the standard error of the interval estimate to 0.25? Round off answer to whole number.

You want to obtain a sample to estimate a population proportion. Based on previous evidence, you believe the population proportion is approximately p∗=72%p∗=72%. You would like to be 98% confident that your esimate is within 4% 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.

You want to obtain a sample to estimate a population proportion. Based on previous evidence, you believe the population proportion is approximately p∗=42%p∗=42%. You would like to be 99.5% confident that your esimate is within 3% 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.

You want to obtain a sample to estimate a population proportion. Based on previous evidence, you believe the population proportion is approximately p∗=31%p∗=31%. You would like to be 98% confident that your esimate is within 0.2% 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.

If you want to be 99% confident of estimating the population proportion to within a sampling error of 0.06 and there is historical evidence that the population proportion is approximately 0.43, what sample size is needed.