Question

(b) To compare the effectiveness of three types of weight-reducing diets, a homogeneous group of 22 women was divided into three sub-groups and each sub-group followed one of these diet plans for a period of two months. The weight reductions, in kgs, were noted as given below: Group I 4.3 3.2 2.7 6.2 5.0 3.9 Group II 5.3 7.4 8.3 5.5 6.7 7.2 8.5 Group III 1.4 2.1 2.7 3.1 1.5 0.7 4.3 3.5 0.3 Use the Kruskal-Wallis test to test the hypothesis that the effectiveness of the three weight reducing diet plans is same at 1% level of significance.

Answer 1