Psy 633

Lab 4 Bivariate Correlation & Regression

Enter the data set in K & F's Chapter 15: Simple Regression. 

a)      Run Analyze, Regression, Linear.  Be sure to request Descriptives.

Is the correlation significant? If so, explain the relationship.

b)      Create a scatterplot with Graphs, Legacy Dialogs, and Scatter/Dot. Then fit the regression line to total. Paste the scatterplot into your assignment please.

c)   In the corner of the scatterplot is displayed R² Linear = 0.739.  What does this mean?  Please be specific.

d)      Write out the regression equation.

e)  With the above regression equation, what will be the average distance between predicted GPAs and actual GPAs.

f)      Use the regression equation to predict GPA when Reading Time = 13 hours. 

g)  What would your advice/warning be to a colleague wanting to use this data set to predict GPA for Reading Time = 35 hours.