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Book Overview & Buying
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Table Of Contents
Data Analysis with R, Second Edition - Second Edition
I would be negligent if I failed to mention the boring but very critical topic of the assumptions of linear models, and how to detect violations of those assumptions. Just like the assumptions of the hypothesis tests in Chapter 6, Testing Hypotheses, linear regression has its own set of assumptions, the violation of which jeopardizes the accuracy of our model and any inferences derived from it to varying degrees. The checks and tests that ensure these assumptions are met are called diagnostics.
There are five major assumptions of linear regression:
We'll briefly touch on these assumptions, and how to check for them in this section here. To do this, we will be using a residual-fitted...