3rd Edition

ISBN: 9780135231548

Author: Gould

Publisher: PEARSON C

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Chapter 13, Problem 28SE

Weights of Athletes Data were collected on the weights of 25 male baseball players and 25 male soccer players. Assume that these are random samples from all college baseball and soccer players. Refer to the Mann-Whitney output. Assume the shapes and spreads of the two distributions are the same.

a. Which group tends to weigh more in this sample? Compare the median weights by referring to the output.

b. Are these data paired or independent? Explain.

c. Test the hypothesis that the median weights are different. Use a 0.05 significance level, and use the Mann-Whitney test.

Chapter 13, Problem 28SE, Weights of Athletes Data were collected on the weights of 25 male baseball players and 25 male

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 27SE

Chapter 13, Problem 29SE

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Chapter 13 Solutions

INTRODUCTORY STAT. W/MYLAB MATH>CUSTOM<

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

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