Statistics 3302

Question

Kevin, a traffic engineer for a metropolitan public transportation service, computes that there is an average of 212 subway delays per 30-day period. Find the probability that there are 200 delays or fewer in a randomly selected 30-day period. Use Excel to find the probability.

Answer 1

As we aren't given the standard deviation, we assume a Poisson process.

=poisson.dist(200,212,1) = 0.2161