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April 18, 2014

Homework Help: Statistics-Probability

Posted by sand on Sunday, January 22, 2012 at 11:57pm.

Data collected on volcanic eruptions give a mean time between eruptions of 29 months. Assume these eruptions occur as a Poisson process in time, find the:
(a) Expected number of eruptions during the five-year period beginning from the time you have read this question.
(b) Probability that there will be exactly two eruptions during this five-year period.
(c) Probability that at least three years will pass from now before the next erupt
(d) Probability that the waiting time between two consecutive earthquakes exceeds two year

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