Question

Page No:
number
n
it u
un are the means
of he groups with a nesh
of observation respectively, then the mean ñ of all
taken together
13
a)
& nič
the
9 groups
c) Σ
niñi
i=1
L=1
n2
b)
Ž nił
1=1
. d) Î n;w;
2n
& Ja
ni
1​

Answer 1

Answer:

sorry I can't understand