A survey was recently conducted in which random samples of car owners of Chrysler, GM, and Ford cars were surveyed to determine their satisfaction. Each owner was asked to rate overall satisfaction on a scale of 1 (poor) to 1000 (excellent).
The following data were recorded:
Chrysler GM Ford
650 400 700
700 800 750
500 500 650
800 400 800
900 600 900
750 900 700
If the analysts are not willing to assume that the population ratings are normally distributed and will use the Kruskal-Wallis test to determine if the three companies have different median ratings, what is the appropriate critical value if the test is to be conducted using an alpha = .05 level?
A) = 5.05
B) 2 = 5.99
C) 2 = 24.99
D) = 3.67
Question 2
If we are interested in testing to determine whether the center of three or more populations is equal when the data in the samples are ordinal, what is the appropriate test to conduct?
A) A t-test
B) An ANOVA
C) A Kruskal-Wallis
D) A Wilcoxon Matched-Pairs Sign Rank test
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