Wolfram|Alpha Statistics & Data Analysis

Random Variables

Expected Value

compute the expected value of a random variable
expected value of |x|^3, x standard normal X~Poisson(7.3), EV[3X^4-7] E[x^2] where x is exponentially distributed expectation of y^2+2y-1 for y having a gamma distribution


compute the probability of an event
P[-1.2<X<2.3] for X~student t with 12 dof prob x>5 for x binomial with n=14 and p=.36 x chisquare with 9 dof, prob 3x-5<7 prob X<16 for X~geometric with p=0.1
compute a conditional probability
probability that x^2>2 given that x>1, x~standard normal