A person with a cough is a persona non grata on airplanes, elevators, or at the theater. In theaters especially, the irritation level rises with each muffled explosion. According to Dr. Brian Carlin,...


A person with a cough is apersona non grata on airplanes, elevators, or at the theater. In theaters especially, the irritation level rises with each muffled explosion. According to Dr. Brian Carlin, a Pittsburgh pulmonologist, in any large audience you'll hear about 15 coughs per minute.


(a) Letr = number of coughs in a given time interval. Explain why the Poisson distribution would be a good choice for the probability distribution ofr.
Coughs are a common occurrence. It is reasonable to assume the events are dependent.

Coughs are a rare occurrence. It is reasonable to assume the events are dependent.

Coughs are a common occurrence. It is reasonable to assume the events are independent.

Coughs are a rare occurrence. It is reasonable to assume the events are independent.




(b) Find the probability of twelve or fewer coughs (in a large auditorium) in a 1-minute period. (Use 4 decimal places.)



(c) Find the probability of at least nine coughs (in a large auditorium) in a 32-second period. (Use 4 decimal places.)


Jun 02, 2022
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