(5) You are charged with assessing the supposed performance-enhancing effects of two rival bodger feed products, Grum Pastelets and MiniGrumlings. Twelve bodgers were trained for the Bodger Iditarod and their performance following training was assessed on a 100-point scale, with 100 being the most magnificent performance. Of the twelve, six were fed GrumPastelets and six were fed MiniGrumlings during training. Using a Mann-Whitney U-test (aka Wilcoxon rank-sum test), assess whether either bodger feed yielded significantly superior performance compared with the other. GrumPastelets MiniGrumlings 65 79 22 38 54 68 37 57 40 75 23 98 (a) Construct a rank table for these data, including scores, ranks, and any appropriate subsequent "data organization" columns to facilitate the statistical test. Then, calculate the Mann-Whitney U statistic. (b) Based on the results from part (a), is there a significant difference in performance between bodgers fed Grum Pastelets and those fed MiniGrumlings? (Identify the relevant Ucrit value from the Mann-Whitney table). If so, which feed underlies superior performance? Use a two-tailed test (of course) with an alpha criterion of 0.05.