he accompanying summary data on skeletal-muscle CS activity (nmol/min/mg) appeared in an article. old Old Young Sedentary Active Sample size 10 8 10 Sample mean 47.18 48.21 57.94 Sample sd 5.59 8.43 7.16 arry out a test at level a = 0.05 to decide whether true average activity differs for the three groups. Suppose that all required ANOVA assumptions are satisfied. If appropriate, investigate differences amongst the means with a multiple comparisons method. (Use i = 1, 2, and 3 respectively.) Calculate the test statistic. (Round your answer to two decimal places.) f= Perform a multiple comparisons analysis to identify significant differences among brands. (Round your answers to two decimal places.) W 12 W13 = W 23 Which pairs are significantly different? (Select all that apply.) a. young and old sedentary b. young and old c. active old sedentary and old active d. There are no significant differences.