If the mean number of serious accidents per year in a large

If the mean number of serious accidents per year in a large factory (where the number of employees remains constant) is five, find the probability that in the current year there will be:

a) Exactly seven accidents

b) Ten or More accidents

c) No accidents

d) Fewer than five accidents

Solution

the Poisson parameter will be five, absolutely correct. To figure

a) p(0) + p(1) + p(2) + p(3) + p(4)+p(5)+p(6)+p(7)

b) Calculate P = p(0) + ... + p(9); that\'s the probability of nine or fewer, so 1 - P is for ten or more! Good luck.

c) P(0)

d) You get the probability of fewer than five accidents by adding: p(0) + p(1) + p(2) + p(3) + p(4). Not too bad.