Chapter 16, Problem 36RP

In Problems 35–37, refer to the specified problem and use the technology of your choice to do the following tasks.

1.                                                             a.      Decide whether conducting a Kruskal – Wallis test on the data is reasonable. If so, also do parts (b)–(d).
2.                                                             b.      Use a Kruskal–Wallis test to decide, at the 5% significance level, whether the data provide sufficient evidence to conclude that a difference exists among the means of the populations from which the samples were taken.
3.                                                              c.      Interpret your results from part (b).
4.                                                             d.      If a one-way ANOVA test was performed on the data, compare the results of the test with those of the Kruskal – Wallis test, paying particular attention to the P-values.

Note: All data sets are on the WeissStats site.

*36. Weight Loss and Leg Power. The data from Problem 33 on the Maximum Nottingham leg power of three weight-loss groups of older men.