Use the following information for questions:
A study compared testosterone levels among athletes in four sports: soccer, track, Lacrosse, and water polo. The total sample size was n =30 (10 soccer, 10 track, 5 Lacrosse, and 5 water polo). A one-way analysis of variance was used to compare the population mean levels for the four sports.
-The sum of squares for groups is SS Groups = 60. What is the Mean Square for groups (MS Groups)?
A) 15
B) 20
C) 60
D) None of the above.

Question

Use the following information for questions:
 A study compared testosterone levels among athletes in four sports: soccer, track, Lacrosse, and water polo. The total sample size was n =30 (10 soccer, 10 track, 5 Lacrosse, and 5 water polo). A one-way analysis of variance was used to compare the population mean levels for the four sports.
-The sum of squares for groups is SS Groups = 60. What is the Mean Square for groups (MS Groups)?
A) 15
B) 20
C) 60
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. The degrees of freedom for groups is the number of groups minus one, which in this case is 4 - 1 = 3. Therefore, MS Groups = SS Groups / degrees of freedom for groups = 60 / 3 = 20.

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