2. A random variable X has CDF F X ( x ) = 0 , x 5 ( x + 5 ) 2 /144 , 5 x 7 1 , x 7 Use the CDF to find: a) E [ X ] b) E [ X 2 ] c) Var [ X ] d) f x ( x )
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2- A random variable X has CDF FX(x)-0-x5(x+5)2-144-5x71-x7 Use the CD.docx
1. 2. A random variable X has CDF F X ( x ) = 0 , x 5 ( x + 5 ) 2 /144 , 5 x 7 1 , x 7 Use the CDF to
find: a) E [ X ] b) E [ X 2 ] c) Var [ X ] d) f x ( x )