Hint(s) O O A simple random sample of 10 items resulted in a sample mean of 60. The population standard deviation is o = 10. 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 90 items. Provide a 95% confidence interval for the population mean. Round your answers to two decimal places. O c. What is the effect of a larger sample size on the interval estimate? Larger sample provides a - Select your answer - margin of error. O