A simple random sample of 40 items resulted in a sample mean of 10. The population standard deviation is o = 10. a. Compite the 95% confidence interval for the population mean. Round your answers to one decimal place. b. Assume that the same sample mean was obtained from a sample of 90 items. Provide a 95% confidence interval for the population mean. Round your answers to two decimal places. c. What is the effect of a larger sample size on the interval estimate? Larger sample provides a - Select your answer-margin of error. #

A simple random sample of 40 items resulted in a sample mean of 10 . The population standard deviation is =10. a. Compinte the 95% confidence interval for the population mean. Round your answers to one decimal place. b. Assume that the same sample mean was obtained from a sample of 90 items. Provide a 95% confidence interval for the population mean. Round your answers to two decimal places. c. What is the effect of a larger sample size on the interval estimate? Larger sample provides a margin of error