Question 3 [10 points] At the local library about 80% of the people actually end up borrowing books. Everyday there are typically about 257 people that come into the library. Assuming that there were 7 people observed coming into the library in a given hour, answer the questions below. For full marks your answer should be accurate to at least three decimal places. How many of the people observed would you expect to sign out a book? Expected number: 0 What is the standard deviation of this distribution? Standard Deviation: 0 What is the probability that the number of people that will get a book is 5? Probability: 0 What is the probability that the number of people that will get a book equals 4 or 5? Probability: 0 What is the probability that the number of people that will get a book is less than or equal to 3? Probability: 0
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This can be found by multiplying the number of people observed (7) by the percentage of people who typically borrow books (80% or 0.8). Expected number = 7 * 0.8 = 5.6 Show more…
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