LEARNING OBJECTIVES
After studying this chapter, you should be able to:

• Differentiate between parametric and nonparametric tests.
• Conduct a sign test to compare population means.
• Conduct a runs test to detect abnormal sequences.
• Conduct a Mann-Whitney test for comparing population distributions.
• Conduct a Wilcoxon test for paired differences.
• Conduct a Friedman test for randomized block designs.
• Compute Spearman's rank correlation coefficient for ordinal data.
• Conduct a chi-square test for goodness of fit.
• Conduct a chi-square test for independence.
• Conduct a chi-square test for equality of proportions.