Analysis Of Gender Differences In Aggression: A t-Test For Two Independent Samples

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Analysis of Gender Differences in Aggression: A t - Test for Two Independent Samples Exercise 9: t - test for two independent samples As preparation for this exercise, you are strongly advised do the Time to Practice exercise 1, 2, and 8 in chapter 11, and check your work against the correct answers in the text. Test the hypothesis that the men are more aggressive than the women in the data set. Use the pretest aggression measures. 1. State the null and research hypotheses: 2. Set the level of significance, or Type 1 error, and explain what it means. 3. Select the appropriate test statistic, and explain why it is appropriate. Describe the formula (11.1) for the statistic and what it means. 4. Compute the test statistic to get the ‘obtained value’. Plug the appropriate values into the formula for the statistic, as on page 194. (note: you can just use SPPS to compute the means and standard deviations). 5. Find the critical value of the statistic from the appropriate table. 6. Compare the obtained and critical value. 7. What do you conclude about your hypothesis, and why? Also, indicate your decision in notational form indicating the test statistic and p value. 8. Did you use a one or two tailed test? Justify your choice. 9. Compute the effect size, and explain what it indicates about the gender differences in aggression. See page 198. Show the computations you did in a spreadsheet, and include a copy of the SPSS printout with your assignment. The spreadsheet should show all steps in the computations as displayed on page 194.
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