finalexam - IE 330 Seat Name Open book and notes 120...

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IE 330 Seat # ________ Name _______________________ Open book and notes. 120 minutes. Covers Chapters 8 through 14 of Montgomery and Runger (fourth edition). Cover page and eight pages of exam. No calculator. (2 points) I have, or will, complete a course evaluation. ____________________________________________________________ ...sign here... NEITK: "not enough information to know" iid: "independent and identically distributed" An element of an experiment is "random" if its value can change with each replication of the experiment. A bar over notation, such as X , denotes the sample mean. There is no need to simplify calculations. Score ___________________________ Final Exam (Dec 16, 2010) Schmeiser
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IE 330 Seat # ________ Name _______________________ Open book and notes. No calculator. 120 minutes. 1. True or false. (2 points each) (a) T F In hypothesis testing, failing to reject H 0 leads to the strong claim that H 0 is true. (b) T F In regression analysis, consider a fitted model that passes through all data points. Because the fit cannot be better, using the fitted model for interpolation also has no error. (c) T F Confidence-interval length goes to zero as sample size goes to infinity. (d) T F Student’s T distribution is used to compare variances. (e) T F If two factors have an interaction effect, the effects are additive. (f) T F In hypothesis testing, with everything else being unchanged, more power is good. (g) T F If only two factors are confounded, doubling the number of observations at each design point will "unconfound" them. (h) T F In hypothesis testing, the greater the distance between the values in H 0 and H 1 , the greater the power of the test. (i) T F For all normal distributions, a bit more than 75% of the probability is within one standard deviation of the mean. (j) T F If ( a , b ) is a 95% confidence interval for the variance σ 2 , then ( a , b ) is a 95% confidence interval for the standard deviation σ .
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