14. Nonparametric Tests 2 Flashcards
1
Q
tests for categorical variables
A
- Pearson’s chi-square test
- Fischer’s exact test
2
Q
For larger samples, use this test
A
Pearson’s chi-square
3
Q
For smaller samples, use this test
A
Fischer’s exact test
4
Q
Smaller samples mean
A
less than 5 expected frequencies in each cell
5
Q
What are you analyzing with categorical data?
A
frequencies vs. means using a contingency table
6
Q
assumptions of categorical data
A
- independence of data
- expected frequencies must be more than 5 in each cell to use Pearson’s chi square test
7
Q
Can you use chi square with repeated measures?
A
no - there must be independence
8
Q
Of the effect sizes from a chi square test, which is the most useful?
A
Cramer’s V
9
Q
What is the goodness of fit test for nonparametric data?
A
- test used when there’s one sample of categorical data
- compare observe and expected frequencies in the population
- provides a chi square stat
10
Q
assumptions of a chi square test (for goodness of fit)
A
- one categorical variable
- independence of observations
- groups of variables must be mutually exclusive
- more than 5 expected frequencies in each group
