## Stats Modeling the World, 4th Edition

Published by Pearson

# Chapter 3 - Displaying and Summarizing Quantitative Data - Exercises - Page 77: 29

#### Answer

a) 1. The distribution of running time is fairly consistent, with the middle 50% running times between 97 and 115. The inter-quartile range is 18. 2. The standard deviation of movie running time is 17.3 minutes, which shows that movie running time is close to the mean running time. b) The inter-quartile range is better than the standard deviation in this distribution because running time is skewed to the right and contains an outlier.

#### Work Step by Step

a) 1. The distribution of running time is fairly consistent, with the middle 50% running times between 97 and 115. The inter-quartile range is 18. 2. The standard deviation of movie running time is 17.3 minutes, which shows that movie running time is close to the mean running time. b) The inter-quartile range is better than the standard deviation in this distribution because running time is skewed to the right and contains an outlier.

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