FinalExamS09 - Stat514S2009 Final Exam (Total 40 Points) 0....

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Stat514S2009 Final Exam (Total 40 Points) 0. Exam time: two hours. 1. Use α =5% throughout the exam. 2. Must show work to get credits. 3. Hand in both question and answer sheets. 1. An industrial engineer is conducting an experiment on eye focus time. He is interested in the effect of the distance of the object from the eye on the focus time. Four different distances (4ft, 6ft, 8ft, 10ft) are of interest. He has five subjects available for the experiment. It is known that individuals are different in eye focus time in general, but this difference is not of interest in the experiment. The data generated from the experiment is given below. Subject Distance 12345 ¯ y i. 4 1 0 6866 7.2 6 76816 5.6 8 53525 4.0 10 34623 3.6 ¯ y .j 6.25 4.75 6.75 2.75 5.0 a)(2pts) What type of design is used in this experiment? Explain its major advantages and disad- vantages. b)(3pts) Given SST = 99 . 80, test if the distances have different effects on the focus time. c)(2pts) Suppose Tukey’s one-degree test for non-additivity is used to make sure distances and sub- jects do not interact. The sum of squares due to the possible interaction between the two factors
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This note was uploaded on 12/09/2011 for the course STAT 514 taught by Professor Staff during the Fall '08 term at Purdue University-West Lafayette.

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FinalExamS09 - Stat514S2009 Final Exam (Total 40 Points) 0....

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