Find the Indicated Mean

Multiple Choice

Find the indicated mean.
-A classical example of the Poisson distribution involves the number of deaths caused by horse kicks to men in the Prussian Army between 1875 and 1894. Data for 9 corps were combined for the 20-year period, and the 180
Corps-years included a total of 135 deaths. Suppose the Poisson distribution will be used to find the probability
That a randomly selected corps-year has more than 2 deaths. Find the mean of the appropriate Poisson
Distribution (the mean number of deaths per corps-year) . Round your answer to the nearest hundredth.

A) 0.75
B) 6.75
C) 1.33
D) 15