Recognize Unusual or Extraordinary Points

Recognize unusual or extraordinary points.
-Suppose a regression model is fit to data and an unusual point is recognized in the
Residual plot. If omitting this point results in a regression model that is very different
From the original, we call this point

A) an outlier.
B) a high leverage point.
C) an influential point.
D) an extrapolated point.
E) all of the above.