QuizCh6

# 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 at the restaurant for dinner, find the probability that the patron will have to wait the following time.
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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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