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  3. last year, a person wrote 142 checks. let the rand

Last year, a person wrote 142 checks. Let the random variable x represent the number...

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Basic Math

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Last year, a person wrote 142 checks. Let the random variable x represent the number of checks he wrote in one day, and assume that it has a Poisson distribution.What is the mean number of checks written per day? What is the standard deviation? What is the variance?The mean number of checks written per day is

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