試題詳解

8. The Sutton police dcpartnent nust write, on average, 6 tickets a day to keep department revenues at budgeted levels. mean of 6.5 tickes per day. Interpret Suppose the number of tickets written per day follows a Poisson distribution with a t the value of the mean.
(A) The mean has no interpretation.
(B) The expecto ted pumber of tickets writt written would be 6.5 per day.
(C) Halt of the days have less tharn 6.5 tickets writen and balf of the days have more than 6,5 tickets written.
(D) The number of tickets that is written most often is 6.5 tickets per day.