Assume that the Poisson distribution applies and that the mean number of hurricanes in a certain area is 7.67.6 per year.
a. Find the probability that, in a year, there will be 66 hurricanes.
b. In a 3535-year period, how many years are expected to have 66 hurricanes?
c. How does the result from part (b) compare to a recent period of 3535 years in which 44 years had 66 hurricanes? Does the Poisson distribution work well here?
a)
P(X=6)= | {e-7.6*7.66/6!}= | 0.133940 (please take care of decimals as required in question) |
b)
expected number =np= 35*0.13394 =4.6879
(please take care of decimals as required in question) |
c)
the result is close to actual value, poisson distribution works well here
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