710-11_Data_Analysis - InClass Exercise A retail hardware...

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In Class Exercise y A retail hardware chain is considering a self-service system for its 326 stores. y Ten stores have been selected for a trial period of 3 months. Ten other stores have been selected in which the traditional shop assistant will operate. y Dollar sales for each of the 20 stores will be recorded weekly for the three-month period. y Prior to the study, weekly sales will be recorded for a month, a ‘before’ measure. The difference in sales between the experimental and control groups is expected to help the management in its decision. 1
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Class Exercise (con’t) 1. What type of experiment is this? (lab or field?) 2. What is the independent variable (treatment) in this study? 3. What is the dependent variable (outcome)? 4. Is this a within-subjects or between-subjects design? How can you tell? 5. Are there any potential extraneous variables which could influence the results? How would you control for them? 2
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This note was uploaded on 03/29/2008 for the course BUSI&CS CS559, MTK taught by Professor Lizhang during the Spring '08 term at University of Wisconsin.

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710-11_Data_Analysis - InClass Exercise A retail hardware...

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