Question
3) In a public opinion poll, approximately 85% of Americans felt that having a police officer on patrol in the neighborhood made them safer than
3) | In a public opinion poll, approximately 85% of Americans felt that having a police officer on patrol in the neighborhood made them safer than having no police officer on patrol. The margin of error reported was 3%. Construct an interval estimate using these figures. |
Answer | |
4) | For each of the following confidence levels, look up the critical z values for a two-tailed test. |
4a) 90% (Hint: 5% in each tail): | Work: |
4b) 95% (Hint: 2.5% in each tail): | Work: |
5) | Remembering that a meta-analysis calculates one mean effect size using the effect sizes of several studies, assume you are conducting a meta-analysis over a set of five studies. The effect sizes for each study are: d= .65, d = .19, d = .42, d = .08, d = .70 |
5a) Calculate the mean effect size of these studies. | |
5b) Use Cohen's conventions to describe the mean effect size you calculated in part (a). |
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