Unformatted text preview: 1 12 18 20 32 74 88 120 (a) Use the sign test (Section 4.3) to answer the question. (b) Use the Wilcoxon signed-rank test (Section 4.2) to answer the question. (c) Although the Mann-Whitney test might be able to address the question of whether the ﬁrst test scores tend to be lower than the second test scores, explain why it should not be used with the data given above. (d) Compute the Spearman rank correlation coeﬃcient, and test to see whether there is signiﬁcant positive correlation. State clearly what question the test addresses and provide a conclusion that deals with that question. (e) Compute Kendall’s tau coeﬃcient and test its signiﬁcance....
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- Spring '11
- Non-parametric statistics, Norm-referenced test, scholastic aptitude test, verbal SAT scores