do you know the formula for variance? and its easier counter part in terms of expected value... use that
then you need a theorem about variance when it comes to constants and random variables... are you familiar with that
hi there, im stuck on this question:
x 1 2 3 4
P(X=x) 0.1 0.2 0.4 0.3
the table shows the distribution of the discrete random variable X, find
(a) Var(X)
(b) Var(X^2)
(c) Var(24x^-1)
can sum1 please help me, i got exam on wednesday, thanxzz