Stat WorkbookWeek3 - Week 3 Chapter 5 Experiments produce...

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Week 3 Chapter 5 Experiments produce good data 1. Write out definitions of the following concepts: a) Explanatory variable A variable that we think explains or causes changes in the response variable. b) Response variable A variable that measures an outcome or result of a study. 2. What happens to these variables in an Experiment? Response variables depend on explanatory variables.  Both variables are  measured to determine the outcome of the experiment 3. What is the difference between an Experiment and an Observational study? An experiment deliberately imposes some kind of treatment on individuals in  order to observe their responses.  An observational study observes individuals  and measures variables of interest but does not attempt to influence the  responses. 4. What is meant by a "Lurking Variable"? It is a variable that has an important effect on the relationship among variables in  a study but is not one of the explanatory variables. 5.
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This note was uploaded on 02/11/2010 for the course STAT 113 taught by Professor Mr.deely during the Spring '10 term at Purdue University Calumet.

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Stat WorkbookWeek3 - Week 3 Chapter 5 Experiments produce...

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