Following information is given regarding a one-way ANOVA test :
There are ‘k’ treatments. each having sample size n1, n2, n3, ......., nk such that the total sample size N = n1 + n2 + n3 + ... + nk.
The degrees of freedom for the mean error sum of squares in the test will be
1
k
2
k - 1
3
N - 1
4
N - k