Survey research and design in psychology/Tutorials/Correlation/Types of correlation and level of measurement

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Types of correlation and level of measurement

Graphical and statistical measures of association by level of measurement

Gnome-settings-background.svg 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)

External links[edit]