RES 726 Exercise for Linear Multiple Regression Data Recent

Use data set from exercise 2 on p. 81 of the Keppel & Zedeck text. Part 2: Create a graphical representation of the data set. Report results in paragraphs. Format the graphical representations and paragraphs consistent with APA guidelines.

Write three to four paragraphs to briefly describe assumptions and value of graphical representations for selected types of representations and results of the exercise.

Create a graph similar to Figure 4.1 on p. 51 of the Fox text, but for the ordinary power transformations X -> Xp for p= -1,0,1,2, 3.

Compare your graph to the figure and comment on the similarities and differences between the two families of transformations, Xp and X(p), on p. 71 in the Fox text.

Write three to four paragraphs to briefly describe relevant concepts for using power transformations using questions as a guide.

Complete the stepwise regression analysis using the given data in the worksheet. In this regression, an interest exists in assessing sales, or y, by evaluating four different predictors:

x1: Production
x2: Employee performance
x3: Marketing
x4: Customer satisfaction