Question

Suppose that the random variable X takes the values -2 ,1 ,4

Answer 1

(1)-2*1/3+1*1/6+4*1/3+6*1/6=11/6

(2)(-2-e)^2*1/3+(1-e)^2*1/6+(4-e)^2*1/3+(6-e)^2*1/6=341/36