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    Poisson distribution, confidence interval, probability

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    1) If you buy a box of Wisk, the probability of getting a scoop is 97%. If you buy 9 boxes over the next several months, what is the probability of missing two scoops?

    2) The average length of a cellular phone call in the U.S. is 3.4 minutes. If the standard deviation of those calls is .07 minutes (population standard deviation), what is a 99% confidence interval? We calculated the mean from 86 cellular calls.

    3) A customer service agent gets a call every 6 minutes. What is the probability that the agent will get less than 8 calls during the third hour she works?

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    The solution solves questions on Poisson distribution, confidence interval, and probability.

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