2. Following is the data showing battery lives in hours for four different brands of smartphones published in an article based on reviews comparisons of products in a laboratory: Brand A 19.60 18.82 19.00 18.45 19.79 19.03 17.89 19.42 Brand B 21.10 20.00 20.43 19.67 18.99 19.98 20.14 19.78 Brand C 10.31 10.02 9.41 9.89 10.05 10.52 11.02 10.42 Brand D 17.02 16.71 17.78 18.65 15.98 17.63 17.00 16.78 16.92 17.14 (c) Write down the formulae, probability distributions and degrees of freedom for the sum of squares in this test once you divide them by the variance o2? (e) Mention the point estimate its probability distribution for the contrast un + MB + Mc 3Mp. What will be the computed test statistic for testing the null hypothesis for this contrast, namely, Ho:MA+MB+ Mc 3up = 0? (f) Construct a single ANOVA table showing F ratios for both (d) and (e)