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Lecture12_updated

Lecture12_updated - Lecture 12 30th May 2011 Example Buses...

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Lecture 12 30 th May 2011

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Example: Buses arrive at a given bus stop every 15 minutes, and you arrive at the bus stop at a random time. What is the probability that you wait 3 minutes before the bus arrives? What is the probability that you wait less than 3 minutes for the bus?

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Hypergeometric Distribution: Physical setup: If we have N objects that can be classified in to exactly two distinct types, “success” (S) vs. “failure” (F). r represents the number of successes and N-r is the number of failures . We pick n objects at random Without replacement. X represents the number of successes. Then X has a hypergeometric distribution.

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Lecture12_updated - Lecture 12 30th May 2011 Example Buses...

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