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 47 business days, the mean closing price of a certain stock was $111.62. Assume the population standard deviation is $11.42. The 90% confidence interval is ( 108.88, 114.36). (Round to two decimal places as needed.). The 95% confidence interval is (). (Round to two decimal places as needed.).

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 47 business days, the mean closing price of a certain stock was $111.62. Assume the population standard deviation is $11.42. The 90% confidence interval is ( 108.88, 114.36). (Round to two decimal places as needed.). The 95% confidence interval is (). (Round to two decimal places as needed.).

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.3: Measures Of Spread

Problem 3GP

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