The following data represent the operating time in hours for 4 types of pocket calculators before a recharge is required. Use the Kruskal-Wallis test, at the 0.01 level of significance, test the hypothesis that the operating times for all four calculators are equal. 109 Fx101 Fx202 Fx303 Fx404 6.1 5.9 7.1 5.3 6.2 5.8 7.1 4.9 6.5 5.9 7.2 6.1 6.2 5.1 7.3 7.1 6.3 1.0 7.4 4.9 84 The following represent the scores of a group of students on two tests. Calculate Spearman rs and Kendall's tau for these data. Test 1 Test 2 36 18 34 26 33 24 29 18 29 15 28 12 28 14 28 13 24 12 22 10 19 12 68