the number of car accidents along the highway between cukier city and fugeville has historically occurred at a mean rate of 8 per month. concerned with this rate, town officials agreed to install speed cameras along the highway. in the first month of operation, the number of accidents was 4. if the number of accidents can be modelled as a poisson distribution, can the town officials conclude that there has been a reduction in the number of accidents? state your null and alternative hypothesis.