Level of Measurement

Statistical

Procedure

Measure of Association

(Strength)

Test of

Significance

One variable is Nominal and the other is Nominal or Ordinal

Crosstabs

Lambda, or Cramer's V

Chi-Square

Both variables are Ordinal

Crosstabs

Tau B if # of values are equal

Tau C if # of values are not equal, or Gamma

Chi-Square

One variable is Nominal or Ordinal and one variable is Interval or Ratio

ANOVA, or Difference of Means

Eta-Squared

T-ratio

Both variables are Interval or Ratio

Correlation/

Regression

Pearson Correlation

T-ratio