Introductory Statistics
1st Edition
ISBN: 9781938168208
Author: Barbara Illowsky, Susan Dean
Publisher: OpenStax College
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Textbook Question
Chapter 10, Problem 33P
Two Population Means with Known Standard Deviations
Use the following information to answer the next five exercises. The mean speeds of fastball pitches from two different baseball pitchers are to be compared. A sample of 14 fastball pitches is measured from each pitcher. The populations have
| Pitcher | Sample Mean Speed of Pitches (mph) | Population Standard Deviation |
| Wesley | 86 | 3 |
| Rodriguez | 91 | 7 |
Table 10.18
What is the test statistic?
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Chapter 10 Solutions
Introductory Statistics
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