Question

5 items 4 6 8 10 12 . if the first 3 ittems are increased by 2 then what should be the value of last 2 items so that the mean remains the same​

Answer 1

(i) All the observation will be increase by 2 as it is clear from below : 2

(i) All the observation will be increase by 2 as it is clear from bel Suppose increased in all the individual observations = X

Zi) All the observation will be increase by 2 as it is clear from bel Hence value of each individual observation will be increased by two 26) All the observation will be increase by 2 as it is clear from bel Suppose decrease in the value of last two observation = X Hence New values will be = Z1)

All the observation will be increase by 2 as it is clear from bel Hence the value of last two items will be increased by 3.

(ii) 20) All the observation will be increase by 2 as it is clear from bel of new values of observation 21) All the observation will be increase by 2 as it isfrom bel It shows that arithmetic mean is affected by extreme values.