The variance of 20 observations is 5. If each observation is multiplied by 2 then the new variance of the resulting observations, is:
The variance of 20 observations is 5. If each observation is multiplied by 2 then the new variance of the resulting observations, is:
Option 1 -
5
Option 2 -
10
Option 3 -
20
Option 4 -
40
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1 Answer
-
Correct Option - 3
Detailed Solution:(Var)new = k² (Var)old
= 4 * 5 = 20
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