Exam4_042709 - ISyE 3770 Exam #4 Name: Note that you are...

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ISyE 3770 Exam #4 Name: Note that you are NOT supposed to reveal any information about this exam to any student. The exam for students taking at the regular time might not be the same as yours. There are FOUR pages and SIX questions in this exam, please make sure that you submit every page to Harry Sharp. Moreover, please remember to submit your homework #7 with your exam. 1. A soft-drink machine at a steak house is regulated so that the amount of drink dispensed is approximately normally distributed with a mean of 200 millliters and a standard deviation of 15 millliters. The machine is checked periodically by taking a sample of 9 drinks and computing the average content. If the sample mean x -bar falls in the interval 191 < x -bar < 209, the machine is thought to be operating satisfactorily; otherwise, we conclude that the population mean μ 200 millliters. (a) Find the probability of committing a Type-I Error. [15 points] (b) Find the probability of committing a Type-I Error when μ = 215 millliters. [15 points] 1
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2. A study was made to determine if the subject matter in a physics course is better
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Exam4_042709 - ISyE 3770 Exam #4 Name: Note that you are...

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