exam 2 practice test answers (AutoRecovered).docx

# exam 2 practice test answers (AutoRecovered).docx - Review...

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Review Problems Exam #2 1. The time it takes to drive from BU to Newton Centre on a weekday morning is normally distributed with a mean, = 24 minutes and a standard deviation, = 8 minutes. What proportion of the drive times will be under 34 minutes? 2. In Problem 1, find the drive time that 3% of the drivers will exceed. 3. In Problem 1, find the probability that a given day’s drive will take exactly 32 minutes. 0 because anything that is just a point on curve is 0 4. The number of accidents at BU in which serious injury occurs is Poisson Distributed with a mean of 3 per month. What is the probability that there are fewer than 5 of these accidents in a given month? 5. Suppose that the Annah-Siver Co. produces items that are 10% defective, the rest good. Each item is independent of each other item. What is the probability that out of a sample of 20 items there is at most one defective item? 6. What is the confidence level for the following interval? Assume a normal distribution.

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