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
Question
100%
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Chapter 20, Problem 20.27E

a.

To determine

To explain: The reason the use of the t procedures is surely safe.

b.

To determine

To find: The 99% t confidence interval for the mean score of all Dallas eighth-graders.

c.

To determine

To check: Whether there is good evidence that the mean for all Dallas eighth-graders is more than the basic level.

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