1.

The second group of two samples has 100 items with mean 15 and S.D=3.If the whole group has 250 items with mean 15.6 and S.D=√13.44, then S.D of first group is

Answer» The second group of two samples has 100 items with mean 15 and S.D=3.If the whole group has 250 items with mean 15.6 and S.D=13.44, then S.D of first group is


Discussion

No Comment Found