Parametric Estimating - Multiple Regression

​This job aid is intended as a complement to the Linear Regression job aid which outlines the process of developing a cost estimating relationship (CER), addresses some of the common goodness of fit statistics, and provides an introduction to some of the issues concerning outliers. You will see the steps in that job aid cited as Steps 1–13, with the Multiple Regression job aid picking up at Step 14.  This job aid specifically addresses the statistics and issues associated with equations involving multiple X variables, beginning with a fairly concise overview of the topics, and then offering somewhat more expanded explanations.