The standard deviation probability distribution of X is σX = √35/12 ≈ 1.7078. Here we have a set of cumulative probability calculators aiming to compute a probability for the following distribution functions: Normal, Lognormal, Gamma. Therefore, the variance of probability distribution of X is approx 2.9167. To find the variance of random vaiable (X) of discrete probability function, use the formula of var(X) i.e., What is the variance of random variable X? We know that the px of X is 16, x=1,2,3,4,5,6, and that mean is 3.5. The probability density function (' p.d.f.
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