The Local Police Department Must Write,on Average,5 Tickets a Day

question 21

Multiple Choice

The local police department must write,on average,5 tickets a day to keep department revenues at budgeted levels.Suppose the number of tickets written per day follows a Poisson distribution with a mean of 6.5 tickets per day.Interpret the value of the mean.

• A)Half of the days have less than 6.5 tickets written and half of the days have more than 6.5 tickets written.
• B)If we sampled all days,the arithmetic average or expected number of tickets written would be 6.5 tickets per day.
• C)The number of tickets that is written most often is 6.5 tickets per day.
• D)The mean has no interpretation since 0.5 tickets can never be written.

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