Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. In statistics, several scatterplot smoothing methods are available to fit a function through the points of a scatterplot to best represent the relationship between the variables. Scatterplots may be smoothed by fitting a line to the data points in a diagram. This line attempts to display the non-random component of the association between the variables in a 2D scatter plot. Smoothing is normally accomplished by using any one of the techniques mentioned below.

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