QuizCh6 - at the restaurant for dinner find the...

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Math 300 – Quiz Chapter 6 - Normal Printed Name: Calculators are allowed on this test. ..neighbors are not ! Show work for credit. 1 5 pts The mean lifetime of a wristwatch is 25 months, with a standard deviation of 5 months. If the distribution of a watch’s lifetime is normal, for how many months should a guarantee be made if the manufacturer does not want to exchange more than 10% of the watches? Assume the variable is normally distributed. 2 The average waiting time to be seated for dinner at a popular restaurant is 23.5 minutes, with a standard deviation of 3.6 minutes. Assume the variable, waiting time, is normally distributed. When a patron arrives
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Unformatted text preview: at the restaurant for dinner, find the probability that the patron will have to wait the following time. A 5 pts Less than 15 minutes. ............................................................................................................. B 5 pts More than 30 minutes. ............................................................................................................. C 5 pts Between 18 minutes and 24 minutes. Dr. Emmert Spring 2011 I of I Points Earned of 20...
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This note was uploaded on 01/16/2012 for the course MATH 300 taught by Professor Keithemmert during the Spring '11 term at Tarleton.

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