mdfidt - Midterm Exam Categorical Data Analysis, CHL5407H...

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Midterm Exam Categorical Data Analysis, CHL5407H INSTRUCTIONS You have until 3:00 p.m. to complete this exam. Show all of your work so that partial credit can be given. Clearly state any assumptions you make in answering a question. This is an open book exam. 1
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1. Results from a cross-sectional study examining the effect of smoking on lung function among employees of a Houston textile plant are provided in Table 1. (a) The purpose of the study was to determine if there is an association between smoking status and lung function. The investigator chose to answer this question using a Pearson chi-square test with three degrees of freedom. Is this procedure appropriate? Provide a brief justiFcation for your response. (b) Suggest an alternative method which could be used to analyze these data. Give one advantage and one disadvantage of this alternative approach. Table 1 Lung Function of Smokers and Nonsmokers Lung Function Never Smoker Current Smoker Total Normal 577 682 1259 Borderline 27 46 73
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This note was uploaded on 11/20/2011 for the course STATISTICS ST3241 taught by Professor Manwai's during the Spring '11 term at National University of Singapore.

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mdfidt - Midterm Exam Categorical Data Analysis, CHL5407H...

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