Explanatory and response variables

# Explanatory and response variables - .,thetwo variablesplay...

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Explanatory and response variables We think that car weight helps explain accident deaths and that smoking  influences life expectancy. In each of these relationships, the two  variables  play  different roles: one explains or influences the other. RESPONSE VARIABLE, EXPLANATORY VARIABLE response variable  measures an outcome of a study. An  explanatory variable   may explain or influence changes in a  response variable . You will often find  explanatory variables  called  independent  variables  and  response variables  called  dependent  variables .  The idea behind this language  is that the  response variable  depends on the  explanatory variable . Because  “independent” and “dependent” have other meanings in  statistics  that are  unrelated to the explanatory-response distinction, we prefer to avoid those words. It is easiest to identify explanatory and  response variables  when we actually set  values of one  variable  in order to see how it affects another  variable .

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After you plot your data, think! The statistician Abraham Wald (1902–1950) worked on war problems during World War
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## This document was uploaded on 11/02/2011 for the course MATH ma 116 at Montgomery.

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Explanatory and response variables - .,thetwo variablesplay...

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