Red and yellow creates orange. Yellow and blue creates green. The secondary colors can be mixed further to create additional shades. Tertiary colors are the result of a primary and secondary color mixed together. For example, orange mixed with red creates red-orange.
An influential point is an outlier that greatly affects the slope of the regression line. One way to test the influence of an outlier is to compute the regression equation with and without the outlier. This type of analysis is illustrated below.
Only the point at x=90 is therefore caught as an outlier, even though the point at x=52 is clearly also an outlier. This occurs because the statistics of centre and distanceâthe mean and standard deviation, respectivelyâthat we're using to spot outliersâ¦ are themselves strongly affected by outliers.