A researcher is comparing 3 groups to test if they have the same means. There are 51 data values altogether. The degrees of freedom for the Between (dfB) and the degrees of freedom for the Within
(dfW) are:
A) dfB = 48, dfW = 50
B) dfB = 2, dfW = 48
C) dfB = 2, dfW = 50
D) dfB = 3, dfW = 50

Question

Quizplus · Accepted Answer

The degrees of freedom between groups (dfB) is calculated as the number of groups minus 1, which is 3 - 1 = 2. The degrees of freedom within groups (dfW) is the total number of data values minus the number of groups, which is 51 - 3 = 48.

A Researcher Is Comparing 3 Groups to Test If They