Question

The mean of 8 observation is 7. If 3 is added to each observation, find the new mean.

Answer 1

Step-by-step explanation:

n = 8

mean of 8 observation = 7

assume the sum of all observations is S.

S/8 = 7.

if 3 is added to each observations

then

8*3 =24

new mean = (S + 24)/8

new mean = (S/8)+(24/8)

new mean = 7 + 3

new mean = 10