Review Exercise XXXXXXXXXXDescribe what happens to the sample size when a. the population standard deviation increases. b. the confidence level increases. c. the bound on the error of estimation...

Review Exercise 10.47. Describe what happens to the sample size when a. the population standard deviation increases. b. the confidence level increases. c. the bound on the error of estimation increases.

Exercise 10.47

a. Determine the sample size required to estimate a population mean to within 10 units given that the population standard deviation is 50. A confidence level of 90% is judged to be appropriate. b. Repeat part (a) changing the standard deviation to 100. c. Re-do part (a) using a 95% confidence level. d. Repeat part (a) wherein we wish to estimate the population mean to within 20 units.