**Cornell University Ergonomics Web**

CUErgo Statistics
Helper: Comparative Statistics |

What type of data do you want to analyze?

Nominal
Ordinal
Interval or Ratio

I have nominal data (e.g. counts, frequencies) and I want to test:

- Proportions in 2 categories (e.g. women and men)
- A 2 x K contingency table (where K = 2 or more) of independent subjects
- A 2 x K contingency table (where K = 2 or more) with repeated measures on subjects

I have ordinal data (e.g. rank data, rating scales with unequal intervals, such as a scale like " poor", "fair", "good") and I want to test:

- Independent groups (i.e. each subject participated in a different treatment condition)
- Repeated measures (i.e. each subject participated in a more than one treatment condition so that repeated measurements were taken for that subject)

I have interval data (e.g. equal interval rating scale, such as a Likert scale, measures, such as inches, degrees etc.) or ratio data (e.g. miles per hour, meters per second) and I want to test:

- Independent groups (i.e. each subject participated in a different treatment condition)
- Repeated measures (i.e. each subject participated in a more than one treatment condition so that repeated measurements were taken for that subject)