Question

In a regression analysis, which of the following statements are true?
I. A residual plot with no pattern indicates a weak linear relationship.
II. A data point is influential if omitting it from the analysis gives a very different regression model.

	a.	I only.
	b.	II only
	c.	I and II
	d.	Neither statement is true

Answer 1

The statements which are true :

II. A data point is influential if omitting it from the analysis gives a very different regression model.

So,

ans-> b) II only.

A residual plot with no pattern is always desirable, this indicates a strong linear relationship.

An influential point is an outlier that greatly affects the slope of the regression line. One way to test the influence of an outlier is to compute the regression equation with and without the outlier.

An influential point is an outlier that greatly affects the slope of the regression line. One way to test the influence of an outlier is to compute the regression equation with and without the outlier.