Question

5. . MO
- 13.20
9. The mean of 15 observations is 22 and median is 15. If 5 is added
to each observation, what are the values of new mean and median?
Ans. : 27, 20​

Answer 1

Answer:

Explanation:

mean= sum of observations / number of observations

given mean=22

number of observations= 15

sum of observations= 22*15= 330

median is 15 means the middle number is 15.

and the number of observations=15 which is odd so median will be the middle number.

new mean if 5 is added to each number is

sum of observations=previous mean+5*number of observations =330+5*15=330+75=405

new mean=405/15=27

meadian is the middle number i.e., 15+5=20