You are given the sample mean and the population standard deviation. Use this information to construct the 90% and95% confidence intervals for the population mean. Interpret the results and compare the widths of the confidenceintervals.From a random sample of 45 business days, the mean closing price of a certain stock was $120.48. Assume thepopulation standard deviation is $11.10.The 90% confidence interval is (.).(Round to two decimal places as needed.)

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Answered: The 90% confidence interval is (.).…

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The 90% confidence interval is (.). Round to two decimal places as needed.)

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Question

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 45 business days, the mean closing price of a certain stock was $120.48. Assume the
population standard deviation is $11.10.
The 90% confidence interval is (.).
(Round to two decimal places as needed.)

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