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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 AL. Number of absences 0 1 2 3 4 5 6 7 8 9 10 Frequency 1 3 7 12 8 6 6 3 2 1 1 [Hint: The mean and variance of a Poisson variable both equal A, so X - H Z = has approximately a standard normal distribution. Now proceed as in the derivation of the interval for p by making a probability statement (with probability 1 - a) and solving the resulting inequalities for #.] (Round your answers to two decimal places.) 3.58 X * 4.71 X Need Help? Read It