Chapter Fourteen - Nonparametric Statistics

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Chapter Objectives

• Describe the rationale of nonparametric statistical test
• Determine when a Mann-Whitney U test is appropriate, perform the test, and interpret the results
• Determine when a Wilcoxon matched-pairs signed-ranks T test is appropriate, perform the test, and interpret the results
• Determine when a Wilcoxon-Wilcos multiple-comparisons test is appropriate, perform the test, and intpret the results
• Calculate a Spearman r_s correlation coefficient and determine the probability that the coefficient came from a population with a correlation of zero

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Chapter Oultine

• Rationale of Nonparametric Tests
• Comparison of Nonparametric and Parametic Tests
• The Mann-Whitney U Test
• The Wilcoxon Matched-Pairs Signed-Ranks T Test
• The Wilcoxon-Wilcox Multiple Comparisons Test
• Correlation of Ranked Data
• My Final Word
• What Would You Recommend? Chapters 9-13