PLS 209                                                                                 Name___________________________
Research Methods
Homework12
Correlation and Regression Using SPSS 

       COMPUTER INSTRUCTIONS

Step 1 Open PD36STA in SPSS

• From the PLS 209 homepage, Go to the SPSS Download Page
• On the SPSS download page, click-on PD36STA 
• Follow the directions on the download page for unzipping the file and opening it in SPSS

Step 2 Generate Bivariate Correlations & Multivariate Linear Regression Statistics 

The home work assignment tests the model that the rate of litigation in a state is the sum of the direct, positive effects of 
(1) wealth and (2) availability of lawyers.  Wealth is measured by 1983 Per Capita Personal income and this should
always be positively related the litigation rate.  Availability of lawyers is measured by the 1980 Population Per Lawyer
which should always be negatively related to the litigation rate.

Use the following variables

    V15       1984 Litigation Cases Rate per 100,000
    V100     1980 Population per Lawyer
    V12       1983 Per Capita Personal Income

• The following steps generates the bivariate correlations and the multiple regression statistics .
•     Select in sequence: Analyze, Regression, Linear
  •  Make 1984 Litigation Cases Rate per 100,000 the dependent variable and enter both 1980 Population per Lawyer and 1983 Per Capita Personal Income as the independent variables
  • Select in sequence: Statistics, Descriptives, and Continue  (This will produce the bivariate correlations)
• Click OK and the regression output should now be in  the output window
  
• Print the output window and then close it

QUESTIONS

Use the correlation matrix to answer the following questions:

1. The bivariate correlation between Litigation and Wealth  is  _____ with a significance level of ______

2. The bivariate correlation between Litigation and Population per Lawyer is  _____ with a significance level of ______

3.  Is there the hypothesized relationship between Litigation and Wealth? _____

4. Is there the hypothesized relationship between Litigation and Population per Lawyer?  ______

5. Is multicolinearltiy between Wealth and population per Lawyer a concern? _______

Use the regression output to answer the following questions:

6. The partial raw slope for Wealth  is   ______ with a significance level of _____.

7. The partial raw slope for Population per Lawyer is ______ with a significance level of _______  

8. The intercept of the regression equation is ___________

9. The regression model with both variables included explains what proportion of the variation in Litigation? _____

10. What portion of the variation in litigation is not explained? ______

11. What is the observed multivariate model?  
  

12. Is it the hypothesized multivariate model? ______

Return to PLS 209 Home Page