Given a random variable x whose probability distribution is:
x = 0, P(x) = .03125
x = 1, P(x) = .15625
x = 2, P(x) = .3125
x = 3, P(x) = .3125
x = 4, P(x) = .15625
x = 5, P(X) = .03125
determine the probability that .
I get , so the equation should be but I can't remember how to figure the probability from that! I know that the Empirical rule tells us that for a mound shaped distribution, the probability should be approx. .95, but how to figure it exactly?