Assign_3_Daumer - Assignment 3 Statistical Analysis by Bob...

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Assignment 3 Statistical Analysis by Bob Daumer EDD 9300 (33696) Methods of Inquiry Nova Southeastern University March 8, 2006
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2 The following research investigation will be used to perform basic statistical analysis. Social psychologists Rind & Bordia (1996) investigated whether or not drawing a happy face on customers’ checks increased the amount of tips received by a waitress at an upscale restaurant on a university campus. During the lunch hour a waitress drew a happy, smiling face on the checks of a random half of her customers. The remaining half of the customers received a check with no drawing. Forty-five participants completed the investigation, twenty-three of which received no happy face on their checks and twenty-two which did receive a happy face on their checks. The following 12 questions analyze the investigation and the results. 1. What type of research question (i.e., descriptive, comparative, relationship) is being asked by the researchers? Briefly explain your answer. This type of research question is a comparative question. The investigation hopes to compare the tip amount (percent) left by customers who receive a check with a happy face to customers who receive a check without a happy face. 2. What were the independent and dependent variables in the study? The independent variable is the existence of the happy face or the non-existence of the happy face. The dependent variable is the amount of tip left by the customer. Compared to a cause-and-effect relationship, where the cause is an independent variable and the effect is the dependent variable, one could say that the existence, or non-existence, of a happy face causes the effect of a particular tip amount.
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3 3. What is the level of measurement for the independent and dependent variables?
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Assign_3_Daumer - Assignment 3 Statistical Analysis by Bob...

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