Stage 33 · Probability

33.8.3 Expectation and Variance of the Binomial Distribution

33.8 Common Distributions and the Normal Distribution

Point 3 of 7

33.8.3 Expectation and Variance of the Binomial Distribution

Core idea

Over n repeats each with success rate p, you average np successes, plugging straight into E(X)=np and D(X)=np(1−p)

Module goal. Get to know three classic distribution models, then step from discrete to continuous, laying the groundwork for population distributions in statistics
eastmath.com · 33.8 Common Distributions and the Normal Distribution · 33.8.3 Expectation and Variance of the Binomial Distribution