Question

8. The mean of 30 numbers is 18, what will be the new mean, if each observation is
increased by 2?

Answer 1

Answer:

ATQ

mean = 18

sum of 30 numbers / 30 = 18

sum of 30 numbers = 540

if each observation is increased by 2

then

new sum of 30 numbers = 540 + 2(30) = 600

divide both sides by 30

new sum of 30 numbers/30 = 20

new mean = 20

hope this will help you