- A political scientist is interested in the question of whetheror not there is a difference between Republicans and Democrats whenit comes to their involvement in voluntary associations. Using a25-point scale to measure involvement in voluntary associations,and collecting information from a random sample of 17 Republicansand 12 Democrats, the political scientist discovers thefollowing:
Republicans: Mean of 12.56, standarddeviation of 3.77
Democrats: Mean of 16.43, standarddeviation of 4.21
Test the null hypothesis at the .05 level of significance.
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- State the null and alternative hypotheses (1 pt).
- Write what a Type I error would be in the context of thisproblem (1 pt).
- Write what a Type II error would be in the context of thisproblem (1 pt).
- Write what Power is in context of this problem (1 pt).
e. Compute the effect size (Cohen’s d) (1 pt).
