A political scientist is interested in the question of whether or not there is a difference...

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  1. 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.

                                        

  1. State the null and alternative hypotheses (1 pt).
  1. Write what a Type I error would be in the context of thisproblem (1 pt).
  1. Write what a Type II error would be in the context of thisproblem (1 pt).
  1. Write what Power is in context of this problem (1 pt).

e. Compute the effect size (Cohen’s d) (1 pt).

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