Using the Kruskal-Wallis Test. In Exercises 5–8, use the Kruskal-Wallis test. Highway Fuel Consumption Listed below are highway fuel consumption amounts (mi/gal) for cars categorized by the sizes of...

Using the Kruskal-Wallis Test. In Exercises 5–8, use the Kruskal-Wallis test.

Highway Fuel Consumption Listed below are highway fuel consumption amounts (mi/gal) for cars categorized by the sizes of small, midsize, and large (from Data Set 20 “Car Measurements” in Appendix B). Using a 0.05 significance level, test the claim that the three size categories have the same median highway fuel consumption. Does the size of a car appear to affect highway fuel consumption?