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Name: The average length of time customers spent on waiting at ABC Store's c
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Description: The average length of time customers spent on waiting at ABC Store's check-out counter before a new P.O.S. system was installed was 5.3 minutes. A sample of 49 customers randomly selected at the check-out counter after the new P.O.S. system was insta

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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The average length of time customers spent on waiting at ABC Store's check-out counter before a new P.O.S. system was installed was 5.3 minutes. A sample of 49 customers randomly selected at the check-out counter after the new P.O.S. system was installed showed that the average waiting time was 5.8 minutes with a sample standard deviation of 2.3 minutes. We wish to determine if there has been a signicant increase (from 5.3 minutes) in the average waiting time after the P.O.S. system was installed. Take α = 0.05.

1. Write appropriate null and alternate hypothesis.

2. Determine the critical value for this test.

3. Calculate test statistic.

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