"Scatter Plots (also called scatter diagrams) are used to investigate the possible relationship between two variables that both relate to the same "event." A straight line of best fit, using the least squares method, is often included." http://images.google.com/imgres?imgurl=http://www.army.mil/ArmyBTKC/i/focus/cpi_tools_13_S.gif&imgrefurl=http://www.army.mil/ArmyBTKC/focus/cpi/tools3.htm&usg=__0dDOMSrSA-kD9eGcIjhcrD2QBG8=&h=393&w=380&sz=40&hl=en&start=3&um=1&tbnid=I7u6CMbgalg0CM:&tbnh=124&tbnw=120&prev=/images%3Fq%3Dscatter%2Bplot%26um%3D1%26hl%3Den%26rlz%3D1T4GPEA_enUS297US302%26sa%3DN
The above scatter plot shows the score difference between the SAT and the BETA test.
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