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.
Therefore, it is important. to be able to detect outliers and influential. points. There is a distinction between the two. because a point that is an outlier (either on y. or in the space of the predictors) will not nec-. essarily be influential in affecting the regression. equation. Examples are given later to illustrate. this concept.