Figure the approximate power of a t test for independent means for each of the following planned studies Use a significance level of 0.05; Number of People in One- or Each Group Two-Tailed Effect Size 30 Medium (0.50) 10 Small (0.20) 20 Large (0.80) 50 Small (0 20) Click the icon to view a table of approximate powers Figure the approximate power of a t test for study (a). Select the correct choice below and, if necessary, fill in the answer box to complete your choice O A. (Round to two decimal places as needed ) O B. Nearly 1 Find the approximate power of a t test for studies (a, b, c, d. )