Last year’s Intro to Bio final contained 20 multiple-choice questions, each weighted equally. The average was 67%. Consider the binomial variable x representing the number of questions correct on a given test. (a) Find p and n. What is the mean and standard deviation? (b) Can the binomial random variable be approximated using a normal random variable? Explain your answer. If so, calculate the probability of any given student getting 15 or more questions correct. If not, calculate this probability with the binomial distribution.

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