Use the following information for questions:
A study compared weight loss among 5 different diet programs. A total sample size of 25 people was studied (5 people from each program) using one-way analysis of variance.
-The sum of squares for groups is SS Groups = 80. What is the Mean Square for groups (MS Groups)?
A) 4
B) 5
C) 20
D) None of the above.

Question

Use the following information for questions:
 A study compared weight loss among 5 different diet programs. A total sample size of 25 people was studied (5 people from each program) using one-way analysis of variance.
-The sum of squares for groups is SS Groups = 80. What is the Mean Square for groups (MS Groups)?
A) 4
B) 5
C) 20
D) None of the above.

Quizplus · Accepted Answer

The Mean Square for groups (MS Groups) is calculated by dividing the sum of squares for groups (SS Groups) by the degrees of freedom for groups. In this case, there are 5 groups, so the degrees of freedom for groups is 5 - 1 = 4. Therefore, MS Groups = SS Groups / degrees of freedom for groups = 80 / 4 = 20.

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