Class 2. The regression assumptions & the impact of outliers.

Table of contents for Class 2

	43-47 .......... Discursive introduction.
	   48 .......... Ideal regression graphics.
	   49 .......... Assumption violations as evidenced by diagnostic
	                    residual plots. 
	   50 .......... Graphics summary of various types of outliers, their
	                    leverage and influence properties.

	51-56 .......... The perfect  regression example.

	      VIOLATION OF ASSUMPTIONS.

	57-60 .......... Autocorrelation violation.
	61-66 .......... Heteroscedasticity violation.

	      OUTLIERS AND THEIR IMPACT.

	   67 .......... Guide to outlier examples.
	69-74 .......... High leverage, big residual and high influence.
	75-82 .......... Low leverage, big residual but small influence.
	83-90 .......... High leverage, small residual and small influence.