Quiz8b_KEY_Sp11 - B Name: _KEY_ 20 April 2011 IE330 Spring...

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Name: ____________KEY______________________ B 20 April 2011 IE330 Spring 2011 Closed book, closed notes, no calculators Quiz #8b For all questions, refer to these figures and output. Please keep your answers short. Kruskal-Wallis Test: Rating versus Rater Kruskal-Wallis Test on Rating Rater N Median Ave Rank Z 1 9 4.000 18.1 -0.15 2 16 4.000 19.8 0.64 3 11 3.000 17.0 -0.55 Overall 36 18.5 H = 0.45 DF = 2 P = 0.798 H = 0.46 DF = 2 P = 0.794 (adjusted for ties)
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Name: ____________KEY______________________ B In this example, 3 groups of raters were asked to rate the desirability of the interior of a new luxury car. Group 1 currently owned a car priced in the $15,000 - $25,000 range, group 2 currently owned a car in the $25,000 – $50,000 range, and group 3 currently owned a car worth more than $50,000. The rating was on a scale of 1 – 7, where 1 = Very poor and 7 = Exceptional. (A rating of 4 was satisfactory.) The null hypothesis of the test is that the different groups rated the car differently from one another. 1.
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Quiz8b_KEY_Sp11 - B Name: _KEY_ 20 April 2011 IE330 Spring...

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