80. Suppose the number X of tornadoes observed in a particular region during a 1-year period has...

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80. Suppose the number X of tornadoes observed in a particular region during a 1-year period has a Poisson distribution with

  8.

a. Compute P(X  5).

b. Compute P(6  X  9).

c. Compute P(10  X).

d. What is the probability that the observed number of tornadoes exceeds the expected number by more than 1 standard deviation?

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