You are testing the equality of four population means with four samples of size six.To compute the within-groups mean square, you should divide the total sum of squares by 3.

Question

Quizplus · Accepted Answer

To compute the within-groups mean square, you should divide the sum of squares within groups by the degrees of freedom within groups, which is calculated as the total number of observations minus the number of groups. With four samples of size six, there are 24 total observations and 4 groups, so the degrees of freedom within groups would be 24 - 4 = 20, not 3.

You Are Testing the Equality of Four Population Means with Four