The variance of 20 observation is 5. If ...

The variance of 20 observation is 5. If each observation is multiplied by 2, then what is the new variance of the resulting observation?

A

5

B

10

C

20

D

40

Verified by Experts

The correct Answer is:

C

`(v_(ar))_("New")=k^(2)(v_(ar))_("Old")=4xx5=20`

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