17. If 1x
17. If 1x , 2 x , 3 x , … , n x are the means of n groups with n1 , n2 , … , nn number of observations respectively, then the mean x of all the groups taken together is given by :
03
Jul
17. If 1x , 2 x , 3 x , … , n x are the means of n groups with n1 , n2 , … , nn number of observations respectively, then the mean x of all the groups taken together is given by : ... 17. If 1x 2 x 3 x n [...]