Unlike the mode or median, the mean is affected by .. ??

Question

Unlike the mode or median, the mean is affected by

a) only those observations that are middle-ranked.

b) only those observations that occur most often.

c) all those observations that are extreme.

d) all observations.

Answer 1

Since the mean is equal to the sum of all the observations divided by the total number of observations, it is affected by d) all observations.