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 anexperiment 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 superherofilm 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 esteemscore 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 thatthe distribution of body esteem scores for each of the two treatments (video and control) is approximately normal.USE SALT(a) Construct a 90% confidence interval for the difference in mean body esteem score for the video treatment and the no video treatment. (Use videotwo decimal places.)"no video*Round your answers toInterpret the interval.O There is a 90% chance that the true difference in mean body esteem score for the video treatment and the no video treatment falls directly in the middle of this interval.There is a 90% chance that the difference in mean body esteem score in this experiment for the video treatment and the no video treatment falls within this interval.O There is a 90% chance that the difference in mean body esteem score in this experiment for the video treatment and the no video treatment falls directly in the middle of thisinterval.(b) Do you think that watching the video has an effect on body esteem? Explain.The confidence interval ---Select---O We are 90% confident that the difference in mean body esteem score in this experiment for the video treatment and the no video treatment falls within this interval.O We are 90% confident that the true difference in mean body esteem score for the video treatment and the no video treatment falls within this interval.to conclude that watching the video has an effect on mean body esteem score because zero ---Select--- included in the confidence interval.

In this research study, the authors investigate the impact of watching movies featuring female…

Answered: - (a) Construct a 90% confidence…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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A psychologist is studying the self image of smokers, as measured by the self-image (SI) score from a personality inventory. She would like to examine the mean SI score, μ, for the population of all smokers. Previously published studies have indicated that the mean SI score for the population of all smokers is 82and that the standard deviation is 12, but the psychologist believes that the value for the mean has decreased. She plans to perform a statistical test. She takes a random sample of SI scores for smokers and computes the sample mean to be 7.Based on this information, answer the questions below. What are the null hypothesis (H0) and the alternative hypothesis (H1) that should be used for the test?H0: μ is ?less than less than or equal togreater thangreater than or equal to not equal toequal to ? 82 74 12 H1: μ is ?less thanless than or equal togreater thangreater than or equal tonot equal toequal to ? 82 74 12 In the context of this test, what is a Type II error?A Type…
A psychologist is studying the self image of smokers, as measured by the self-image (SI) score from a personality inventory. She would like to examine the mean SI score, μ , for the population of all smokers. Previously published studies have indicated that the mean SI score for the population of all smokers is 80 and that the standard deviation is 12 , but the psychologist believes that the value for the mean has decreased. She plans to perform a statistical test. She takes a random sample of SI scores for smokers and computes the sample mean to be 74 . Based on this information, answer the questions below. What are the null hypothesis ( H0 ) and the alternative hypothesis ( H1 ) that should be used for the test? H0 : μ is ?less thanless than or equal togreater thangreater than or equal tonot equal toequal to ?748012 H1 : μ is ?less thanless than or equal togreater thangreater than or equal tonot equal toequal to ?748012In the…
Prob & Stats Unable to solve 90% confidence interval of the differences in the nurses.
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When you hold the mouse pointer over a point on the graph, the specific value corresponding to that point appears (e.g., “California, 2013 - 19.4%”) as well as a line called “90% Confidence” followed by an range of values. Generally speaking, what does the range of values denoted by “90% Confidence” indicate?
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Explain the difference between a point estimate and confidence interval. Provide an example.
A psychologist is studying the self image of smokers, as measured by the self-image (SI) score from a personality inventory. She would like to examine the mean SI score, µ, for the population of all smokers. Previously published studies have indicated that the mean SI score for the population of all smokers is 80 and that the standard deviation is 15, but the psychologist has good reason to believe that the value for the mean has changed. She plans to perform a statistical test. She takes a random sample of SI scores for smokers and computes the sample mean to be 88. Based on this information, complete the parts below. (a) What are the null hypothesis H. and the alternative hypothesis H₁ that should be used for the test? Ho : H₁ :0 (b) Suppose that the psychologist decides not to reject the null hypothesis. What sort of error might she be making? Type I Suppose the true mean SI score for all smokers is 80. Fill in the blanks to describe a Type I error. the hypothesis that u is (Choose…
Twelve different video games showing violence were observed. The duration times of violence were recorded, with the times (seconds) listed below. Assume that these sample data are used with a 0.05 significance level in a test of the claim that the population mean is greater than 90 sec. If we want to construct a confidence interval to be used for testing that claim, what confidence level should be used for a confidence interval? If the confidence interval is found to be 4.5 sec<μ<200.2 sec, what should we conclude about the claim? 82 13 545 48 0 59 207 46 170 0 2 56
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