Difficult
Once again, I'm having trouble applying the formula. In part (b), I kind of followed along, but what happens to the k! in the denominator? Is it because the book only considered the cases where k=0 or k=1, since then k! would be 1? Also, to find the number of bites a random postman sustains, do we take the derivative? If so, why?
Reflective
I was very happy that I could understand the derivation of the Poisson distribution in part (a). The book is hard to follow, but after playing with the equation a bit I got the final formula. However, as mentioned above, I'm still confused about which values are assigned to which variables when applying a formula.
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