Step 3: Assess Fit and Apply Remedies If Necessary
Reminder of Fit Steps
Once we have produced
an initial regression analysis including diagnostics, the next step
is to assess initial fit.
As we have learned in
the first sections of this chapter, regression fit is concerned with
the question “does my data make a straight-line shape?”
In other words, for particular relationships in the regression analysis,
does most of the data lie close to the best possible straight line?
You typically answer this question through three major means:
-
Characteristics of the data: Linear regression has certain assumptions, regarding the shape of the data distribution. These are fairly mechanical, but need to be done before proceeding to other fit assessments. ...
Get Business Statistics Made Easy in SAS now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
