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Unformatted text preview: Stat 665 (Spring 2011) Kaizar Homework 4 Due at the beginning of class, Monday May 2 . Aim of Homework : To practice working with GLMs. Reading : An Introduction to Categorical Data Analysis, 2nd edition: Chapter 3. Exercises : 40 points total 1. (8 points) A researcher was interested in determining the effectiveness of a new toothpaste for preventing cavities after two years of use. The researcher only recruited patients who had no cavities. For the 50 patients randomly selected to receive the new treatment and the 50 randomly selected to receive the usual practice, the researcher measured: • gender • age • cavity1 = number of cavities after 1 year of treatment • cavity2 = number of cavities after 2 years of treatment • fluoride = 1 if patient uses mouthwash, = 0 otherwise • floss = 1 if patient uses dental floss, = 0 otherwise (a) Which of these variables is the outcome of interest?...
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This note was uploaded on 07/26/2011 for the course STA 665 taught by Professor Staff during the Spring '10 term at Ohio State.
- Spring '10