Aplia, 1 term Printed Access Card for Gravetter/Wallnau's Essentials of Statistics for the Behavioral Sciences, 8th
8th Edition
ISBN: 9781285079707
Author: Frederick J Gravetter, Larry B. Wallnau
Publisher: Cengage Learning
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Chapter 15, Problem 9P
The color red is often associated with anger and male dominance. Based on this observation, Hill and Barton (2005) monitored the outcome of four combat sports (boxing, tae kwan do, Greco-Roman wrestling, and freestyle wrestling) during the 2004 Olympic games and found that participants wearing red outfits won significantly more often than those wearing blue.
- a. In 50 wrestling matches involving red versus blue, suppose that the red outfit won 31 times and lost 19 times. Is this result sufficient to conclude that red wins significantly more than would be expected by chance? Test at the .05 level of significance.
- b. In 100 matches, suppose red won 62 times and lost 38. Is this sufficient to conclude that red wins significantly more than would be expected by chance? Again, use α = .05.
- c. Note that the winning percentage for red uniforms in part b is identical to the percentage in part b (31 out of 50 is 62%, and 62 out of 100 is also 62%). Although the two samples have an identical winning percentage, one is significant and the other is not. Explain why the two samples lead to different conclusions.
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Chapter 15 Solutions
Aplia, 1 term Printed Access Card for Gravetter/Wallnau's Essentials of Statistics for the Behavioral Sciences, 8th
Ch. 15.2 - For a chi-square test, the expected frequencies...Ch. 15.2 - Prob. 2LCCh. 15.2 - A researcher has developed three different designs...Ch. 15.3 - A researcher would like to know which factors are...Ch. 15.5 - 1. A researcher completes a chi-square test for...Ch. 15.5 - Prob. 2LCCh. 15 - Prob. 1PCh. 15 - Gven, Elaimis, Binokay, and Tan (2003) studied the...Ch. 15 - Prob. 3PCh. 15 - Data from the department of motor vehicles...
Ch. 15 - Research has demonstrated that people tend to be...Ch. 15 - Suppose that the researcher from the previous...Ch. 15 - Prob. 7PCh. 15 - Automobile insurance is much more expensive for...Ch. 15 - The color red is often associated with anger and...Ch. 15 - Research suggests that romantic background music...Ch. 15 - Mulvihill, Obuseh and Caldwell (2008) conducted a...Ch. 15 - Research has demonstrated strong gender...Ch. 15 - Prob. 13PCh. 15 - Prob. 14PCh. 15 - Prob. 15PCh. 15 - Prob. 16PCh. 15 - Research results suggest that IQ scores for boys...Ch. 15 - Gender differences in dream content are well...Ch. 15 - In a study similar to one conducted by Fallon and...Ch. 15 - A recent study indicates that people tend to...Ch. 15 - Research indicates that people who volunteer to...Ch. 15 - Although the phenomenon is not well understood, it...Ch. 15 - For the following scores. X Y 7 6 9 6 6 3 12 5 9 6...Ch. 15 - For the following data: X Y 1 2 4 7 3 5 2 1 5 14 3...Ch. 15 - A developmental psychologist would like to...Ch. 15 - A communications company has developed three new...
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