hw1 - MAT 3378 3X - Spring 2010 Assignment 1 : Deadline:...

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Unformatted text preview: MAT 3378 3X - Spring 2010 Assignment 1 : Deadline: Tuesday, May 25, 2009 (In Class) Question 1: 1. An automotive engineer was interested in the effect of four alternative rubber compounds on the life of automobile tires. To carry out the study, five tires were manufactured from each of the four compounds and five automobiles were obtained for testing. With each automobile, the four tire types were assigned at random to the four wheels. Each automobile was driven for 40,000 miles and the amount of wear on each of the four tires was recorded. (a) What type of study is this, experimental, observational, or mixed? Why? (b) What is the basic unit of study? (c) What factors and factor levels are being studied here? (d) Suppose that six compounds were under study instead of four. What type of study design is suggested? 2. A rehabilitation center was interested in examining the relationship be- tween physical fitness prior to surgery of persons undergoing corrective knee surgery and the time required in physical therapy until successful rehabilitation. Data on the number of days required for successful com- pletion of physical therapy and the prior physical fitness status (below...
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This note was uploaded on 12/22/2011 for the course MAT 3378 taught by Professor G.lamothe during the Spring '11 term at University of Ottawa.

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hw1 - MAT 3378 3X - Spring 2010 Assignment 1 : Deadline:...

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