Question

The A Mon-
observations is Mif
the sum of (1)
Observations is a
then the mean of
remaining 4
observations​

Answer 1

Answer:

Given a1+a2+a3+a4+....+ann = M (1) ( a1 + a2 + a3 + a4 + .... + an - 4 ) = a (2) From (1) and (2) a + an - 3 + an - 2 + an - 1 + an = nM an - 3 + an - ...