Mathematics (AS & A Level) · May / June 2017 · Paper 73 · Question 7

In the past the number of accidents per month on a certain road was modelled by a random variable with distribution Po0.47 . After the introduction of speed restrictions, the government wished to test, at the 5% significance level, whether the mean number of accidents had decreased. They noted the number of accidents during the next 12 months. It is assumed that accidents occur randomly and that a Poisson model is still appropriate.

Read automatically from the paper; the printed page above is exact.