SSTR= j=1 The given data are below. Treatment Treatment Treatment A B C 33 44 34 29 42 22 36 30 45 36 25 46 37 28 48 42 Sample mean 29 45 37 Sample variance 8.50 5.00 9.00 There are 3 treatments, so k = = . Each treatment has 5 observations, so nnB = C= . The total number of observations is n n+ng+n Since each treatment has the same number of observations, the overall sample mean for the k sample means is found as follows. Find the overall sample mean. = j = k ===== k 29 +45 + 37