Question: Use Table 3.3: Suppose you are planning to do a study where you will use a one-sample t test. On the basis of past research, you think that the effect size you are trying to detect may he approximately equal to Cohen's d = .30. You plan to use a = .05, 'non-directional (two-tailed). (a) If you want to have power of .80, what minimum N do you need in the sample? (b) If you can afford to have only N = 20 participants in the sample, approximately what is the expected level of statistical power?

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