Q. 125.0( 1 Vote )

If the standard deviation of a variable X is σ, then the standard deviation of the variable is
A. a σ

B.

C.

D.

Answer :

We have


Mean (X) =


We can write as: Mean (X) =


Mean (X) =


Var(X) =


Now, Substitute the value of yiand Y, then we get








Hence, Proved

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