Question 3 2 pts In analysis of variance, MS between-groups provides a measure of ____ 0 standard deviation 0 the total variability for the set of N scores 0 the overall mean for the set of N scores 0 differences among treatment means Question 4 2 pts An independent-measures research study compares three treatment conditions using a sample of n = 5 in each treatment. For this study, the three totals are, T1 = 5, T2 = 10, and T3 = 15. What value would be obtained for the grand mean, Mgrand? O2 010 015 OS