Recitation_III_Worksheet_Spr_09

# Recitation_III_Worksheet_Spr_09 - Stat 201 Recitation...

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Stat 201 Recitation Worksheet III 1. Bob drives home from work to his home in the suburbs, leaving his office in University City at 4:02 PM. He listens to the traffic report on KYW-AM as he drives out of the parking garage. If the report says that I-95 has no backups, he takes that route. Otherwise, he takes the surface roads. Historically, the report says that I-95 has no backups 55% of the time. Assume that what happens on any given day is independent of what happens on any other day. (a) What is the probability that he will take I-95 on seven of the next ten work days? (b) What is the probability that he will take I-95 on at least two of the next 10 work days? (c) Let X represent the number of times that he will take I-95 during the next ten work days. What is the mean and standard deviation of X ? 2. Suppose that the time that it takes Sue to get to work is a random variable having a uniform distribution with a minimum of 40 minutes and a maximum of 60 minutes. What is the probability that it will take Sue at least 48 minutes to get to work? Also, what is the mean

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## This note was uploaded on 09/26/2011 for the course STAT 201 taught by Professor Drex during the Spring '04 term at Drexel.

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Recitation_III_Worksheet_Spr_09 - Stat 201 Recitation...

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