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Quiz: Ch 6 Quiz Time Limit: 02:00: This Question: 1 pt 1 of 6 (4 complete) This Quiz: 6 pts possible 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. Interpret the results and compare the widths of the confidence intervals. From a random sample of 49 business days, the mean closing price of a certain stock was $109.71. Assume the population standard deviation is $10.46. The 90% confidence interval is (, (Round to two decimal places as needed.) The 95% confidence interval is( (Round to two decimal places as needed.)