The Binomial Probability Distribution
distribution. The mean value of a Bernoulli variable is = p, so the expected number of S’s on any single trial is p. Since a binomial experiment consists of n trials, intuition suggests that for X ~ Bin(n, p), E(X) = np, the product of the
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www3.nd.eduB. A binomial distribution gives us the probabilities associated with independent, repeated Bernoulli trials. In a binomial distribution the probabilities of interest are those of receiving a certain number of successes, r, in n independent trials each having only two possible outcomes and the same probability, p, of success.