Chapter 4 summary

Chapter 4 summary - Chapter4summary , variabley,

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Chapter 4 summary  To study relationships between  variables , we must measure the  variables  on  the same group of  individuals . If we think that a  variable   x  may explain or even cause changes in another  variable   y , we call  x  an  explanatory variable  and  y  a  response variable . scatterplot  displays the relationship between two  quantitative variables   measured on the same  individuals . Mark values of one  variable  on the  horizontal axis ( x  axis) and values of the other  variable  on the vertical axis ( axis). Plot each individual’s data as a point on the graph. Always plot the  explanatory variable , if there is one, on the  x  axis of a  scatterplot . Plot points with different colors or symbols to see the effect of a  categorical   variable  in a  scatterplot . In examining a 
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This document was uploaded on 11/02/2011 for the course MATH ma 116 at Montgomery.

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Chapter 4 summary - Chapter4summary , variabley,

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