Question

the the sum of deviation of observation from 25 is 25 and sum of deviations of the the same n observation from 35 is-2 5 find the the mean of the observation

Answer 1

Answer:

From the value of '25' the sum of deviation of the data =sigma×i=25

mean=25+25/n

25n+25/n

from the value '35'the sum of deviations of the same data =sigma×i=-25

mean =35+(-25)/n35n-25/n

mean of the given data =25n+25/n+35n-25/n/2

50n/n+10n/n/2

60n/n/2

30

mean of the given data=30