PSY 555 Homework 18

1. Please
determine the percent variation accounted for by a model including two variables
where:

(a). The semipartial correlation for the first variable is .482.

(b). The partial
correlation for the second variable is .63.

2. For each of the following graphs, draw in the points that
could change the regression equation to resemble that of the dotted line. Justify your answer in terms of diagnostics
and influence. The number
of points you need to draw in each are given.

(a). Two points (b). Four points

(c). Two points (d). One
point