Exam 17: Introduction to Nonparametric Statistics

A marketing firm is interested to know whether the median age of college students is 21 years. A sample of 80 college students is taken. Thirty of the students were under 21, 45 of the students were over 21, and 10 were 21 years old. The conclusion is that

The makers of furnace filters recently conducted a test to determine whether the median number of particulates that would pass through their four leading filters was the same. A random sample of 6 of each type of filter was used with the following data being recorded: If the Kruskal-Wallis test is used, the critical value for an alpha = .05 is 7.814

The Kruskal-Wallis test is usually limited to comparing sample values from ________ or more populations.