An internal study by the technology services department at


An internal study by the Technology Services department at Lahey Electronics revealed company employees receive an average of four e-mails per hour. Assume the arrival of these e-mails is approximated by the Poisson distribution.

(a) What is the probability Linda Lahey, company president, received exactly one e-mail between 4pm and 5pm yesterday?

(b) What is the probability she did not receive any e-mail during this period?

(c) What is the probability she received ten or more e-mails during the same period?

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Econometrics: An internal study by the technology services department at
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