14. Nonparametric Tests 2

Question 1

tests for categorical variables

Answer 1

• Pearson’s chi-square test

- Fischer’s exact test

Question 2

For larger samples, use this test

Answer 2

Pearson’s chi-square

Question 3

For smaller samples, use this test

Answer 3

Fischer’s exact test

Question 4

Smaller samples mean

Answer 4

less than 5 expected frequencies in each cell

Question 5

What are you analyzing with categorical data?

Answer 5

frequencies vs. means using a contingency table

Question 6

assumptions of categorical data

Answer 6

• independence of data

- expected frequencies must be more than 5 in each cell to use Pearson’s chi square test

Question 7

Can you use chi square with repeated measures?

Answer 7

no - there must be independence

Question 8

Of the effect sizes from a chi square test, which is the most useful?

Answer 8

Cramer’s V

Question 9

What is the goodness of fit test for nonparametric data?

Answer 9

• test used when there’s one sample of categorical data
• compare observe and expected frequencies in the population
• provides a chi square stat

Question 10

assumptions of a chi square test (for goodness of fit)

Answer 10

• one categorical variable
• independence of observations
• groups of variables must be mutually exclusive
• more than 5 expected frequencies in each group