A phone company has conducted a study of the time its clients spend talking on their cellular phones each day. For a sample of 10 clients the company has obtained a sample standard deviation of 13.3 minutes. We assume that the talk time follows a normal distribution. The confidence interval at the 90% level for the standard deviation of the talk time in the population is:

A phone company has conducted a study of the time its clients spend talking on their cellular phones each day. For a sample of 10 clients the company has obtained a sample standard deviation of 13.3 minutes. We assume that the talk time follows a normal distribution. The confidence interval at the 90% level for the standard deviation of the talk time in the population is:

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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