Exhibit 9-22The manager of a grocery store has taken a random sample of 36 customers. The average length of time it took thecustomers in the sample to check out was 4.2 minutes. The population standard deviation is known to be 0.4 minute.We want to test to determine whether or not the mean waiting time of all customers is significantly more than 4minutes.Refer to Exhibit 9-22. The test statistic is1.961.65O2.003.00

It is given that Sample size n = 36 Sample mean = 4.2 Population SD = 0.4

Answered: The manager of a grocery store has…

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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