Data Science, Data, Statistics, Statistical Analysis, Data Analysis.
variance of the random variable X(Sum of two dice) with our well familiar rolling two dice example. PMF for that followed Let’s find out E(X) or μ which is 7: E(X²) will be 54.833 as solved below. Now, Variance(X) = E(X²) − μ² Now you know what the Expectation and Variance of a discrete random