Which of the following statements is true for a within-subjects design? O They require a large sample size. O They are not ideal for longitudinal studies. O None of the options. O They decreases variance.Compared to a between-subjects design, a within-subjects design tends to have variance and a chance of detecting an effect. 0 none of the options 0 less; greater 0 more; lesser 0 less; lesser For each of the following sets of results, compute the appropriate test statistic, test the indicated alternative hypothesis, and compute the effects size(s) indicating their magnitude: set hypothesis Op n a) #1 = H2 33.4 32.9 3 23 0.10 b) "1 > H2 98.8 93 9.4 21 0.05 C) H1 = H2 74.8 72.4 6.6 20 0.01