I've read in the news that the last month five pedestrians died from a population of 500,000 Remembering that it is a poisson problem (the famous prussian horse kicks by Ladislaus Bortewicz). I fired up R to understand the probability
ppois(5*12, 3, lower.tail=F)
since in a month died 5, I multiplied it by 12 months and compared it to the official statistics of 3 pedestrians a year in this area. The result:
So, yes this is an unusual case. Am I doing everything right?