Tutorial 4_Questions & Solutions

Tutorial 4_Questions & Solutions - 1 Tutorial 4...

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1 Tutorial 4 Tutorial Exercises Lecture 4 NONPARAMETRIC TESTS At the end of this tutorial you should be able to conduct a Mann-Whitney U test for the difference between two medians conduct a Kruskal-Wallis test for the difference between several medians conduct a Kolmogorov-Smirnov goodness-of-fit test conduct a Lilliefors goodness-of-fit test b Reading : Black et al ., Sections 17.2, 17.5. Q1. (Keller et al p.634). Do collectors and non-collectors of supermarket coupons differ in their perceptions of the importance of coupons in their patronage of a particular supermarket? Suppose that 10 collectors and 10 non-collectors were asked to rate the importance (on a 5-point scale from 1 = least important to 5 = most important) of coupons in their choice of supermarket. The results are shown in the table below. Collectors Non-collectors 1 2 5 1 3 4 3 4 2 2 3 1 2 1 1 2 4 3 2 1 Can we conclude at the 5% level of significance that collectors and non-collectors have different perceptions about the importance of coupons? Q2.
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This note was uploaded on 10/21/2009 for the course ECON 1320 taught by Professor John during the Three '08 term at Queensland.

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Tutorial 4_Questions & Solutions - 1 Tutorial 4...

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