CEE 110 PS4 11

# CEE 110 PS4 11 - UNIVERSITY OF CALIFORNIA LOS ANGELES Civil...

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UNIVERSITY OF CALIFORNIA, LOS ANGELES Civil and Environmental Engineering Department CEE 110 Introduction to Probability and Statistics for Engineers Spring Quarter 2010 MW 12-2 PM Franz 1178 Prof. K. D. Stolzenbach 5732J Boelter Hall, 206-7624 [email protected] Problem Set 4 (due Wednesday April 27, 2011) _____________________________________________________________________________ 1. (problem 4-68 in text) The demand for water use in Phoenix in 2003 hit a high of about 442 million gallons per day on June 27, 2003 ( http://phoenix.gov/WATER/wtrfacts.html ). Water use in the summer is normally distributed with a mean of 310 million gallons per day and a standard deviation of 45 million gallons per day. City reservoirs have a combined storage capacity of nearly 350 million gallons. (a) What is the probability that a day requires more water than is stored in city reservoirs? (b) What reservoir capacity is needed so that the probability that it is exceeded is 1%? (c) What amount of water use is exceeded with 95% probability? (d)

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## This note was uploaded on 10/22/2011 for the course ENG 101 taught by Professor Yukov during the Spring '11 term at UCLA.

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CEE 110 PS4 11 - UNIVERSITY OF CALIFORNIA LOS ANGELES Civil...

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