Question

a
random variable X can take the values -1.0 and 1 with respective probabilities 0.2,0. 5 and 0.3. The expected value of x is​

Answer 1

Answer:

Expected value of x is​ 0.1 .

Step-by-step explanation:

We are given the following data ;

       X                      P(X)               X * P(X)

       -1                        0.2                   -0.2

        0                       0.5                     0

        1                        0.3                     0.3

Expected value of X = $\frac{\sum X*P(X)}{\sum P(X)}$ = (-0.2 + 0.3) ÷ 1 = 0.1 .