9.51 The population mean waiting time to check out of asupermarket has been 4 minutes. Recently, in an effort to reducethe waiting time, the supermarket has experimented with a sys-tem in which infrared cameras use body heat and in-store soft-ware to determine how many lanes should be opened. A sample of100 customers was selected, and their mean waiting time tocheck out was 3.10 minutes, with a sample standard deviation of2.5 minutes.a. At the 0.05 level of significance, using the critical valueapproach to hypothesis testing, is there evidence that the pop-ulation mean waiting time to check out is less than 4 minutes?b. At the 0.05 level of significance, using the p-value approach tohypothesis testing, is there evidence that the population meanwaiting time to check out is less than 4 minutes?c. Interpret the meaning of the p-value in this problem.

Given that We have to conduct hypothesis testing for the claim that population mean wait time is…

Answered: 9.51 The population mean waiting time…

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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