Advertisements
Advertisements
Question
Find the mean of 12, 17, 31, 25, 15. Find the resulting mean if observation is increased by 2.
Sum
Advertisements
Solution
Given: Data: 12, 17, 31, 25, 15 (n = 5).
Sum = 12 + 17 + 31 + 25 + 15
= 100
Mean = `100/5`
= 20
If observation is increased by 2:
New sum
= 100 + 5 × 2
= 110
⇒ New mean
= `110/5`
= 22
Or
Use property:
20 + 2
= 22
shaalaa.com
Is there an error in this question or solution?
