A random sample of medical files is used to estimate the proportion p of all people who have blood type B. I USE SALT (a) If you have no preliminary estimate for p, how many medical files should you include in a random sample in order to be 85% sure that the point estimate will be within a distance of 0.04 from p? medical files (b) Answer part (a) if you use the preliminary estimate that about 12 out of 90 people have blood type B. (Round your answer up to the nearest whole number.) medical files

You want to obtain a sample to estimate a population proportion. Based on previous evidence, you believe the population proportion is approximately 32%. 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 =

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 90% confident that you estimate is within 1.5% of the true population proportion. How large of a sample size is required? Do not round mid-calculation. n =

You want to obtain a sample to estimate a population proportion. Based on previous evidence, you believe the population proportiòn is approximately 85%. You would like to be 99% confident that your estimate is within 2% of the true population proportion. How large of a sample size is required? Do not round mid-calculation. n =

You want to obtain a sample to estimate a population proportion. Based on previous evidence, you believe the population proportion is approximately p∗=26%. You would like to be 99.9% confident that your estimate is within 1% of the true population proportion. How large of sample size is required?n =

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 99.5% confident that you esimate is within 1.5% of the true population proportion. How large of a sample size is required?

You want to obtain a sample to estimate a population proportion. At this point in time, you have no reasonable estimation for the population proportion. You would like to be 99.9% confident that you estimate is within 0.1% of the true population proportion. How large of a sample size is required?

You want to obtain a sample to estimate a population proportion. Based on previous evidence, you believe the population proportion is approximately 90%. You would like to be 95% confident that your estimate is within 2% of the true population proportion. How large of a sample size is required? n =