Last year, a person wrote 119 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 (Round to three decimal places as needed.) The standard deviation is (Round to three decimal places as needed.) The variance is (Round to three decimal places as needed.) C

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