AP Statistics Chapter 6 Discrete, Binomial & Geometric ...
Mean (expected value) of a Binomial Random Variable Formula: P np Meaning: Expected number of successes in n trials (think average) Example: Suppose you are a 80% free throw shooter. You are going to shoot 4 free throws. For n = 4, p = .8, P (4)(.8) 3.2, which means we expect 3.2 makes out of 4 shots, on average
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