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

ORDINAL DATA

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)

INTERVAL or RATIO DATA

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)

Use WebStat for Data Analysis

Return to CUErgo Statistics Helper Home Page