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NDA Math Statistics
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© examsnet.com
Question : 49
Total: 100
The variance of 20 observations is 5. If each observation is multiplied by 3, then what is the new variance of the resulting observations?
[NDA I 2017]
5
10
15
45
Validate
Solution:
New variance
=
5
×
(
3
)
2
=
45
© examsnet.com
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