Question: 3. You are planning a study in which you predict an effect size of .50. You plan to test significance using a t test for

3. You are planning a study in which you predict an effect size of .50. You plan to test significance using a t test for dependent means, one-tailed, using a significance level of .05.

(a) What is the power of this study if you carry it out with 20 participants?

(b) How many participants would you need to have 80% power?

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