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IV. A researcher has 10 participants rate their mood (-100 = extremely negative, +100 extremely positive) before watching a sad movie and after watching a sad movie. Their mood ratings prior to watching the movie and after watching the movie are listed below. Assume that both sets of mood ratings come from normally distributed populations with equal variances. Prior After 22 Participant 1 -10 23 20 43 23 -12 34 4 40 56 19 51 -30 -38 3 20 8. 9. 10 15 10 Does watching the sad movie affect participants' moods (use a = .02, two-tailed)? A. What are the null hypothesis and the alternative hypothesis? B. What are the critical value(s) (make sure to indicate what degrees of freedom were used to determine this)? C. Use SPSS to calculate your test statistic. D. Explain why you would or would not reject the null hypothesis. E. Use SPSS to help you calculate Cohen's d and r (measures of effect size) F. Use SPSS to calculate a 98% CI for the mean difference in mood across time.

IV. A researcher has 10 participants rate their mood (-100 = extremely negative, +100 extremely positive) before watching a sad movie and after watching a sad movie. Their mood ratings prior to watching the movie and after watching the movie are listed below. Assume that both sets of mood ratings come from normally distributed populations with equal variances. Prior After 22 Participant 1 -10 23 20 43 23 -12 34 4 40 56 19 51 -30 -38 3 20 8. 9. 10 15 10 Does watching the sad movie affect participants' moods (use a = .02, two-tailed)? A. What are the null hypothesis and the alternative hypothesis? B. What are the critical value(s) (make sure to indicate what degrees of freedom were used to determine this)? C. Use SPSS to calculate your test statistic. D. Explain why you would or would not reject the null hypothesis. E. Use SPSS to help you calculate Cohen's d and r (measures of effect size) F. Use SPSS to calculate a 98% CI for the mean difference in mood across time.

College Algebra (MindTap Course List)
College Algebra (MindTap Course List)
12th Edition
ISBN:9781305652231
Author:R. David Gustafson, Jeff Hughes
Publisher:R. David Gustafson, Jeff Hughes
Chapter8: Sequences, Series, And Probability
Section8.7: Probability
Problem 58E: What is meant by the sample space of an experiment?
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Page of 3 IV. A researcher has 10 participants rate their mood (-100 = extremely negative, +100 extremely positive) before watching a sad movie and after watching a sad movie. Their mood ratings prior to watching the movie and after watching the movie are listed below. Assume that both sets of mood ratings come from normally distributed populations with equal variances. Participant 1 Prior After -10 22 43 23 23 3 20 -12 40 34 6. 56 51 19 -30 -38 7 8. 20 3 10 15 10 Does watching the sad movie affect participants' moods (use a = .02, two-tailed)? A. What are the null hypothesis and the alternative hypothesis? B. What are the critical value(s) (make sure to indicate what degrees of freedom were used to determine this)? C. Use SPSS to calculate your test statistic. D. Explain why you would or would not reject the null hypothesis. E. Use SPSS to help you calculate Cohen's d and r2 (measures of effect size) F. Use SPSS to calculate a 98% CI for the mean difference in mood across time. MacBook Air
Transcribed Image Text:Page of 3 IV. A researcher has 10 participants rate their mood (-100 = extremely negative, +100 extremely positive) before watching a sad movie and after watching a sad movie. Their mood ratings prior to watching the movie and after watching the movie are listed below. Assume that both sets of mood ratings come from normally distributed populations with equal variances. Participant 1 Prior After -10 22 43 23 23 3 20 -12 40 34 6. 56 51 19 -30 -38 7 8. 20 3 10 15 10 Does watching the sad movie affect participants' moods (use a = .02, two-tailed)? A. What are the null hypothesis and the alternative hypothesis? B. What are the critical value(s) (make sure to indicate what degrees of freedom were used to determine this)? C. Use SPSS to calculate your test statistic. D. Explain why you would or would not reject the null hypothesis. E. Use SPSS to help you calculate Cohen's d and r2 (measures of effect size) F. Use SPSS to calculate a 98% CI for the mean difference in mood across time. MacBook Air
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