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Answer to Question #15880 in Statistics and Probability for Hillary

Question #15880
According to a report from the center off studying health system change 20 percent of Americans will delay or go without medical are because of concerns about cost. Suppose 8 individuals are randomly selected. What is the probability that at least 7 will delay or go without medical care. Round answer to 4 decimal places and show work.
Expert's answer
Using Poisson's distribution we calculate P(7) and P(8) using it's formula:

P(7)=(0.2)^7/7!*e^(-0.2)=0.0000
P(8)=(0.2)^8/8!*e^(-0.2)=0.0000
P(x>=7)=P(x=7)+P(x=8)=0.0000

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