Question

If the mean of the observations 1,2,3,4,5,6,7 is 4 then find the mean of
observations (i) 11.5, 21.5, 31.5, 41.5, 51.5, 61.5, 71.5 and (ii)1.4, 1.5, 1.6, 1.7, 1.8,
1.9,2.0 without making actual computation.​

Answer 1

Answer:

i) mean=41.5

ii)mean=1.7