Use the Wilcoxon matched-pairs signed rank test and  0.05 to analyse the before-and-aft er measurements given. Assume the underlying distributions are symmetrical.

Before After 49 43 41 29 47 30 39 38 53 40 51 43 51 46 49 40 38 42 54 50 46 47 50 47 44 39 49 49 45 47