The degrees of freedom error (within group variation)of a completely randomized design (one-way)ANOVA test with 4 groups and 15 observations per each group is:
A)3
B)56
C)59
D)14
E)4

Question

Quizplus · Accepted Answer

The degrees of freedom for error in a one-way ANOVA is calculated as the total number of observations minus the number of groups. Here, there are 4 groups with 15 observations each, so the total number of observations is 60. The degrees of freedom for error is 60 - 4 = 56.

The Degrees of Freedom Error (Within Group Variation)of a Completely