Question: Consider the following calculations for a one-way analysis of variance with 20 total observations. The response variable is sales in millions of dollars and four treatment levels represent the four regions that the company serves. Given: MSE = 101.25, Grand mean = 39, Xbar₁ = 33, Xbar₂ = 43, Xbar₃ = 49, and Xbar₄ = 31. Perform pairwise multiple comparisons for all possible mean differences and specify which means are equal. Let alpha = .05