Exercise 08.03 Algo (Population Mean: Sigma Known) Question 8 of 10 A simple random sample of 40 items resulted in a sample mean of 50. The population standard deviation is o = 15. a. Compute 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 130 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 - V margin of error. O- Icon Key O Eli 52"F Sunny ~ 91 x 20