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The superintendent of a large school district, having once had a course in probability and
statistics, believes that the number of teachers absent on any given day has a Poisson distribution
with parameter . Use the accompanying data on absences for 50 days to obtain a 95% large-
sample CI for . [Hint: The mean and variance of a Poisson variable both equal , so Z=/nX Now
proceed as in the derivation of the interval for p by making a probability (Round your answers to
two decimal places.) Answer: (,)

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  • 1. The superintendent of a large school district, having once had a course in probability and statistics, believes that the number of teachers absent on any given day has a Poisson distribution with parameter . Use the accompanying data on absences for 50 days to obtain a 95% large- sample CI for . [Hint: The mean and variance of a Poisson variable both equal , so Z=/nX Now proceed as in the derivation of the interval for p by making a probability (Round your answers to two decimal places.) Answer: (,)