Consider the following ANOVA summary table:
|
Source of variation
|
Degrees of freedom
|
Sum of squares
|
Mean square
|
F
|
|
Between Groups
|
3
|
300
|
100
|
10
|
|
Within Groups
|
8
|
80
|
10
|
|
|
Total
|
11
|
428
|
|
|
Verify that the number of groups is J = 4, the total number of observations is N = 12 and that with α = .025 the critical value is 5.42.