Question

If f(x) is the p.d.f of the continuous random variable x, then E(x²) is

Answer 1

Hi ,

If f( x ) is the probability density

function ( PDF ) of a continuous

random variable x , then

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E( X² ) = integral of ( - infinity to + infinity ) x²f( x ) dx

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Therefore ,

Option ( c ) is correct.

I hope this helps you.

: )