Cumulative distribution function The probability distribution of a discrete random variable X is given below: Value...

Question

Question

math Statistics-And-Probability

Answer 1

Answer #1

We know that

Fx(x) = P(X<T)

Fx(-1) = P(X<-1)

= P(X=-4) +P( X=-3) +P(X=-2)+P(X=-1)

=0.24 +0.11+0.26+ 0.28

= 0.89

We know that

Plc<x<d) = Fx(d) - Fx(c)

Thus Fx(-2) - Fxl-4) = P(-4 < X < -2)

=P(X=-3) +P(X=-2)

= 0.11+0.26

= 0.37

Fxl-9/4) = Fx(-2.25) = P(X< -2.25)

= P(X<-3)

= P( X=-4) +P(X=-3)

= 0.24 +0.11

= 0.35

Answer 2

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