Question

If a constant value 50 is subtracted from each observation of a set,

the mean of the set is.

(a)increased by 50 (b) decreased by 50 (c) is not affected (d) zero​

Answer 1

Answer:

Variance is the mean of the squares of the deviations from the mean. Therefore, if a constant value that is 15 is subtracted from each observations of the set, then the variance will not be altered as the effect of such a act will be managed at the time of calculating the deviations of the series.

Answer 2

Answer:

b) is the right option if constant value of 50 is substracted from each observation of set the mean of set is decreased by 50