Si - week 15b worksheet

# Si - week 15b worksheet - MATH 218 SI Session(Fall 2008...

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MATH 218 SI Session (Fall 2008) Week 15 Worksheet (12/01 – 12/07) SI Leader: Joy Chen [email protected] Prof. Lin & Prof. Song www.usc.edu/si Last Weekly SI Session of the Semester!! 1. Over the past year, an airline manager studied the departure times of planes scheduled to leave LAX on weekday mornings at 7 a.m. and found that they were uniformly distributed between 7 a.m. and 7:20 a.m. a. Find the probability that a randomly selected plane scheduled to depart at 7 a.m. departed more than 15 minutes late. b. Find the average departure time of planes officially scheduled to depart at 7 a.m. c. Find the standard deviation of the departure time of planes officially scheduled to depart at 7 a.m. d. The next twenty-five weekdays are taken to be a random sample. i. Find the expected number of planes that depart more than 15 minutes late. ii. Find the standard deviation of planes that depart more than 15 minutes late. 2.

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## This note was uploaded on 01/30/2009 for the course MATH 39514 taught by Professor He during the Fall '08 term at USC.

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Si - week 15b worksheet - MATH 218 SI Session(Fall 2008...

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