Group 1 Group 2 11 2 14 9 7 0 8 5 Mean 10 4
The first step is to compute the difference between means. For
these data, the difference is six. The second step is to compute the
number of ways these eight numbers could be divided into two groups
of four. The general formula is:
where W is the number of ways, N is the total number of numbers (8 in this case), n1is the size of the first group (4 in this case) and n2 is the size of the second group (4 in this case). Therefore, W = 8!/(4! 4!) = 70.