STAT 3006 Lecture Notes - Lecture 14: Scatter Plot, Dependent And Independent Variables
14 Oct 2018
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Document Summary
Two variables are associated if knowing the value for one variables gives you information about the value for the other. This is often discussed as a response variable against an explanatory variable. A response variable (x-axis) measures the outcome of interest, while an explanatory variable (y-axis) is the variable thought to explain the response. They provide a simple graphical basis for evaluating the extent of association. To add a categorical variable, it is usually best to plot a different color or symbol for each category. Sometimes, points on a scatter plot are represented by a trend line or a line of best fit. This line does not have to actually pass through points, but it should reflect the overall trend.
