Stats: Data and Models (3rd Edition)

Published by Pearson
ISBN 10: 0321692551
ISBN 13: 978-0-32169-255-9

Chapter 4 - Displaying and Summarizing Quantitative Data - Exercises - Page 73: 11

Answer

a) The mean is larger than the median because the distribution is skewed to the right. b) The data is bimodal and skewed to the right. The mode is near 8 days. Another mode is at 1 day (this may represent patients who didn’t survive). Most of the patients stay between 1 and 15 days. There are some extremely high values above 25 days. c) The median and IQR, because the distribution is strongly skewed.

Work Step by Step

a) The mean is larger than the median because the distribution is skewed to the right. b) The data is bimodal and skewed to the right. The mode is near 8 days. Another mode is at 1 day (this may represent patients who didn’t survive). Most of the patients stay between 1 and 15 days. There are some extremely high values above 25 days. c) The median and IQR, because the distribution is strongly skewed.
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