# Wilcoxon Test

Written Questions

1. (row total x column total)/grand total

2. ANOVA test

3. Wilcoxon rank sum test

4. Fisher’s exact test

Multiple Choice Questions

1. Fisher’s exact test

a. Name 2 criteria for using the Wilcoxon rank sum test.

b. Name the test: continuous groups, more than 2 groups.

c. What type of test is used to compare before/after mean differences?

d. Name the test: computers used, exact p-value (no minimum sample size requirements),

used to test equality of 2 proportions.

2. nonparametric methods less sensitive for finding true differences because they throw away

information (only use ranks)

need full data set, not just summary statistics

a. Name 3 advantages of the Wilcoxon rank sum test.

b. Name 2 disadvantages of the Wilcoxon rank sum test.

c. What type of data uses t-tests?

d. Name 2 criteria for using the Wilcoxon rank sum test.

3. continuous data

a. Name 2 disadvantages of the Wilcoxon rank sum test.

b. Name the test: continuous groups, more than 2 groups.

c. Name 3 advantages of the Wilcoxon rank sum test.

d. What type of data uses t-tests?

4. 2-sample t-test

a. What type of test would you use to compare proportions with a small sample size?

b. What type of test is used to compare before/after mean differences?

c. What type of test is used to compare means in 2 individual groups?

d. What type of data uses t-tests?

True/False Questions

1. Name 2 criteria for using the Wilcoxon rank sum test. â†’ nonparametric methods less

sensitive for finding true differences because they throw away information (only use ranks)

need full data set, not just summary statistics

True False

2. Name 3 advantages of the Wilcoxon rank sum test. â†’ does not assume populations are

normally distributed (2-sample t-test requires that assumption with small sample sizes)

uses only ranks–do not need precise numerical outcome

not sensitive to outliers

True False

3. What type of test is used to compare before/after mean differences? â†’ paired t-test

True False

4. Describe the sample size requirements for the chi-square approximation method. â†’ (row

total x column total)/grand total