Interpreting scatterplots

Interpreting scatterplots - EXAMINING A SCATTERPLOT...

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Interpreting scatterplots EXAMINING A SCATTERPLOT In any graph of data, look for the  overall pattern  and for striking  deviations  from  that pattern. You can describe the overall pattern of a  scatterplot  by the  direction, form,  and  strength  of the relationship. An important kind of deviation is an  outlier ,  an  individual  value that falls outside  the overall pattern of the relationship. EXAMPLE 4.4 Understanding state SAT scores SOLVE (INTERPRET THE PLOT):   Figure       4.1      shows a clear  direction:  the overall  pattern moves from upper left to lower right. That is, states in which higher  percents of high school graduates take the SAT tend to have lower  mean  SAT  mathematics scores. We call this a  negative association  between the two  variables . clusters The  form  of the relationship is roughly a straight line with a slight curve to the

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This document was uploaded on 11/02/2011 for the course MATH ma 116 at Montgomery.

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Interpreting scatterplots - EXAMINING A SCATTERPLOT...

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