The VO₂max of 10 males and 10 females was measured before and after a 12-week physical fitness program. How many degrees of freedom would be associated with the numerator of the F-ratio for interaction?

Question

Quizplus · Accepted Answer

The degrees of freedom for the interaction in a two-way ANOVA (which seems to be the case here, with gender and time as factors) are calculated by multiplying the degrees of freedom for each factor. Since there are 2 levels for gender (male, female) and 2 levels for time (before, after), the degrees of freedom for each are 1 (2-1 for gender and 2-1 for time). Thus, the degrees of freedom for the interaction are 1*1 = 1.

The VO2max of 10 Males and 10 Females Was Measured

The VO₂max of 10 Males and 10 Females Was Measured