The mean of 30 observations of a data is 18.What will be the new mean if each observation is
increased by 3
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Answered by
5
Answer:
21
Step-by-step explanation:
Mean = 18
We know that if each number is increased by k then the mean also increases by k
Henceforth if 3 is added to each observation then New Mean = 18 + 3
= 21
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Answered by
4
New mean = 18+3 = 21
As sum = 30x18 = 540
Add 30x3 = 90
New sum 540+90 = 630
New mean = 630/30 = 21
As sum = 30x18 = 540
Add 30x3 = 90
New sum 540+90 = 630
New mean = 630/30 = 21
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