3rd Edition

ISBN: 9780135163146

Author: Gould

Publisher: PEARSON

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Chapter 13, Problem 26SE

Sleep Typically, do men and women sleep different amounts? At a small private college in California, a random sample of students were asked how many hours of sleep they got last night. The figure shows the output for a Mann-Whitney test. Test the alternative hypothesis that the median number of hours of sleep for all men at this college is not equal to the median for all women at the same college, using a significance level of 0.05.

Chapter 13, Problem 26SE, Sleep Typically, do men and women sleep different amounts? At a small private college in California,

Definition Definition Middle value of a data set. The median divides a data set into two halves, and it also called the 50th percentile. The median is much less affected by outliers and skewed data than the mean. If the number of elements in a dataset is odd, then the middlemost element of the data arranged in ascending or descending order is the median. If the number of elements in the dataset is even, the average of the two central elements of the arranged data is the median of the set. For example, if a dataset has five items—12, 13, 21, 27, 31—the median is the third item in ascending order, or 21. If a dataset has six items—12, 13, 21, 27, 31, 33—the median is the average of the third (21) and fourth (27) items. It is calculated as follows: (21 + 27) / 2 = 24.

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Chapter 13, Problem 25SE

Chapter 13, Problem 27SE

Chapter 13 Solutions

INTRODUCTORY STATISTICS (LOOSELEAF)

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Solution Summary: The author explains the steps to test the hypothesis using Mann-Whitney test.

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