Intro Stats
4th Edition
ISBN: 9780321826275
Author: Richard D. De Veaux
Publisher: PEARSON
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Textbook Question
Chapter 20, Problem 62E
Pulse rates A researcher wanted to see whether there is a significant difference in resting pulse rates for men and women. The data she collected are displayed in the boxplots and summarized below.
| Sex | ||
| Male | Female | |
| Count | 28 | 24 |
| 72.75 | 72.625 | |
| 73 | 73 | |
| StdDev | 5.37225 | 7.69987 |
| 20 | 29 | |
| IQR | 9 | 12.5 |
- a) What do the boxplots suggest about differences between male and female pulse rates?
- b) Is it appropriate to analyze these data using the methods of inference discussed in this chapter? Explain.
- c) Create a 90% confidence interval for the difference in mean pulse rates. (From technology, dƒ = 40.2.)
- d) Does the confidence interval confirm your answer to part a? Explain.
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Chapter 20 Solutions
Intro Stats
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