Survey research and design in psychology/Tutorials/Correlation/Types of correlation and level of measurement
Jump to navigation
Jump to search
Types of correlation and level of measurement
Graphical and statistical measures of association by level of measurement
View the accompanying screencast: [1] |
1st/2nd variable | Nominal | Ordinal | Interval/Ratio |
---|---|---|---|
Nominal | Clustered bar chart Chi-squared (X2), Phi (φ) or Cramer's V |
← Treat as for | Clustered bar chart or scatterplot Point bi-serial correlation (rpb) |
Ordinal | Clustered bar chart or scatterplot Spearman's Rho (rs) or Kendall's Tau |
←↑ Treat as for | |
Interval/Ratio | Scatterplot Product-moment correlation (r) |