Introduction To Statistics And Data Analysis

6th Edition

ISBN: 9781337793612

Author: PECK, Roxy.

Publisher: Cengage Learning,

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Textbook Question

Chapter 11.1, Problem 18E

The authors of the paper “The Empowering (Super) Heroine? The Effects of Sexualized Female Characters in Superhero Films on Women” (Sex Roles [2015]: 211–220) were interested in the effect of watching movies that portrayed female heroines in roles that focus on their sex appeal on female viewers. They carried out an experiment in which female college students were assigned at random to one of two experimental groups. The 23 women in one group watched 13 minutes of scenes from the X-Men film series and then responded to a questionnaire designed to measure body esteem. Lower scores on this measure correspond to lower body satisfaction. The 29 women in the other group (the control group) did not watch any video prior to responding to the questionnaire measuring body esteem. For the women who watched the X-Men video, the mean body esteem score was 4.43 and the standard deviation was 1.02. For the women in the control group, the mean body esteem score was 5.08 and the standard deviation was 0.98. You may assume that the distribution of body esteem scores for each of the two treatments (video and control) is approximately normal.

a. Construct and interpret a 90% confidence interval for the difference in mean body esteem score for women who watch the video and those who do not.
b. Do you think that watching the video has an effect on body esteem? Explain.

Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.

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Chapter 11.1, Problem 17E

Chapter 11.1, Problem 19E

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The authors of a research article were interested in the effect of watching movies that portrayed female heroines in roles that focus on their sex appeal on female viewers. They carried out an experiment in which female college students were assigned at random to one of two experimental groups. The 22 women in one group watched 13 minutes of scenes from a certain superhero film series and then responded to a questionnaire designed to measure body esteem. Lower scores on this measure correspond to lower body satisfaction. The 26 women in the other group (the control group) did not watch any video prior to responding to the questionnaire measuring body esteem. For the women who watched a certain superhero video, the mean body esteem score was 4.42 and the standard deviation was 1.02. For the women in the control group, the mean body esteem score was 5.06 and the standard deviation was 0.99. You may assume that the distribution of body esteem scores for each of the two treatments (video…

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The authors of a research article were interested in the effect on female viewers of watching movies in which female heroines were portrayed in roles that focus on their sex appeal. They carried out an experiment in which female college students were assigned at random to one of two experimental groups. The 24 women in one group watched 13 minutes of scenes from a certain superhero film series and then responded to a questionnaire designed to measure body esteem. Lower scores on this measure correspond to lower body satisfaction. The 27 women in the other group (the control group) did not watch any video prior to responding to the questionnaire measuring body esteem. For the women who watched the video, the mean body esteem score was 4.44 and the standard deviation was 1.02. For the women in the control group, the mean body esteem score was 5.07 and the standard deviation was 0.98. For purposes of this exercise, you may assume that the distribution of body esteem scores for each of the…

Chapter 11 Solutions

Introduction To Statistics And Data Analysis

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Solution Summary: The author explains the 90% confidence interval for difference in mean score for women who watch the video and those who do not. The assumption for the two-sample t-test is satisfied.

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