Question
A pizza shop claims that it's average delivery time is less than 30 minutes. A random selections of 36 delivery times has a sample average
A pizza shop claims that it's average delivery time is less than 30 minutes. A random selections of 36 delivery times has a sample average 28.5 minutes with a standard deviation of 3.5 minutes. Is there enough evidence to support the claim with a 95% confidence level (a=.05)?
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Business Statistics
Authors: Robert A. Donnelly
2nd Edition
0321925122, 978-0321925121
