Question

42: If a is a constant then Var(ax)=
3323545302
a. Var(x)
a? Var(x)
ax
0​

Answer 1

Given  :   a is a constant then  

To Find : Var(ax)=

Solution:

a is a constant

SD =Standard deviation

then SD ( ax) = a  SD (x)

Variance  = (SD)²

=>  Var(ax)=   = a² Var (x)

Var(ax)=   = a² Var (x)

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