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April 21, 2014

Homework Help: statistics

Posted by Michael on Friday, September 30, 2011 at 7:02pm.

A retail store has implemented procedures aimed at reducing the number of bad checks cashed by its cashiers. The store's goal is to cash no more than eight bad checks per week. The average number of bad checks cashed is 3 per week. Let x denote the number of bad checks cashed per week. Assuming that x has a Poisson distribution:

(a)probability that the store's cashiers will not cash any bad checks in a particular week.

(b)probability that the store will meet its goal during a particular week.

(c)probability that the store will not meet its goal during a particular week.

(d)probability that the store's cashiers will cash no more than ten bad checks per two-week period.

(e)probability that the store's cashiers will cash no more than five bad checks per three-week period.

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