Mathematical Statistics with Applications
Mathematical Statistics with Applications
7th Edition
ISBN: 9780495110811
Author: Dennis Wackerly, William Mendenhall, Richard L. Scheaffer
Publisher: Cengage Learning
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Chapter 1.3, Problem 9E

Resting breathing rates for college-age students are approximately normally distributed with mean 12 and standard deviation 2.3 breaths per minute. What fraction of all college-age students have breathing rates in the following intervals?

  1. a 9.7 to 14.3 breaths per minute
  2. b 7.4 to 16.6 breaths per minute
  3. c 9.7 to 16.6 breaths per minute
  4. d Less than 5.1 or more than 18.9 breaths per minute
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Mathematical Statistics with Applications

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