The number of people arriving for treatment at an emergency room can be modeled by a...

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The number of people arriving for treatment at an emergency room can be modeled by a Poisson Distribution with a rate parameter of seven per hour

(a) What is the probability that exactly four arrivals occur during a particular hour? (Round your answer to three decimal places.)

(b) What is the probability that at least four people arrive during a particular hour? (Round your answer to three decimal places)

(c) How many people do you expect to arrive during a 45-min period? people

math Statistics-And-Probability

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e7 x 240] 4 ! RT 2 4 o.og/2 ← 7 2 1 */24o1 + 16827 + 117649 t 823543 24 12.0 20 5°40 ( o 10 I 5 1617 1+2+3+4+ 5+6+748 36 people n =

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