When you have completed this chapter, you will be able to:

1. Conduct the sign test for dependent samples using the binomial and standard normal distributions as the test statistics.



2. Conduct a test of hypothesis for dependent samples using the Wilcoxon signed-rank test.



3. Conduct and interpret the Wilcoxon rank-sum test for independent samples.



4. Conduct and interpret the Kruskal-Wallis test for several independent samples.



5. Compute and interpret Spearman's coefficient of rank correlation.



6. Conduct a test of hypothesis to determine whether the correlation among the ranks in the population is different from zero.