Question

As a general rule, the number of arrests made per day at a police station follows a Poisson's law with an average of 3. During the month of April, 100 arrests were made.
a) Who are the individuals in this sample and what is the average observed?
b) Can we conclude with a significance level of 0.1 that the level of neighborhood crime has gone up based on the numbers for the month of April?
(c) If there were 103 arrests in May, can we conclude with a level
of significance 0.1 that the level of criminality has risen based on the
figures for the months of April and May?

Answer 1