You are given the sample mean and the population standard deviation. Use this information to construct the 90% and 95% confidence intervals for the population mean. In compare the widths of the confidence intervals From a random sample of 48 business days, the mean closing price of a certain stock was $112. 10. Assume the population standard deviation is $9.71. The 90% confidence interval is (Round to two decimal places as needed ) The 95% confidence interval is ]. (Round to two decimal places as needed ) Which interval is wider? Choose the correct answer below