The Basic Practice of Statistics
The Basic Practice of Statistics
8th Edition
ISBN: 9781319042578
Author: David S. Moore, William I. Notz, Michael A. Fligner
Publisher: W. H. Freeman
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Chapter 20, Problem 20.51E
To determine

To construct: The 90% confidence interval for the mean time advantage of right-hand over left-hand threads.

To find: The mean time for right-hand threads as a percent of the mean time for left-hand threads.

To check: Whether the time saved would be of practical importance if the task were performed many times.

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