The table below summarizes the IQ summary of 2 groups Group A control and Group B given a pill before the test. (We will assume equal variance) mean standard deviation n. Group A 85.7 9.6 13 Group B 91.3 6.1 9 When testing at alpha = 20%, if the true mean IQ of A differs from B The Critical Value used to determine the rejection region is: both -0.86 and 0.86 both 1.325 and -1.325 1.325 -1.325