Question

Consider a binomial experiment with n=5 and p=0.20 What is p(x≥2)?

Consider a binomial experiment with n=5 and p=0.20

What is p(x≥2)?

Homework Answers

Answer #1

P(X = x) = nCx * px * (1 - p)n - x

P(X > 2) = 1 - P(X < 2)

              = 1 - (P(X = 0) + P(X = 1))

               = 1 - (5C0 * (0.2)^0 * (0.8)^5 + 5C1 * (0.2)^1 * (0.8)^4)

                = 1 - 0.7373

                = 0.2627

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