A restaurant manager is designing a system that is intended to decrease the variance of the time
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A restaurant manager is designing a system that is intended to decrease the variance of the time customers wait before their meals are served. Under the old system, a random sample of 10 customers had a variance of 400. Under the new system, a random sample of 21 customers had a variance of 256 . At \(\alpha=0.10\), is there enough evidence to convince the manager to switch to the new system? Assume both populations are normally distributed.
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Related Book For
Elementary Statistics Picturing The World
ISBN: 9781292260464
7th Global Edition
Authors: Betsy Farber, Ron Larson
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