Well, what is
It is the cumulative distribution function. What do you get when you sum over the distribution function for all What do you get when you sum over the distribution function to some
Consider a random variable X that takes only nonnegative integer values. Show that the following
is a way of computing the expectation of X:
E(X) = (sum of this function from x=0 to x= infinity) (sum symbol) Pr(X > x)