Data analysis in criminal justice:
Input the data from the textbook (page 16) into SPSS.
Run descriptive statistics. What is the mean for the education variable? What is the mean for the income variable?
Run a regression analysis.
What is the coefficient for the intercept as shown on the SPSS printout? What does the coefficient for the intercept mean?
What is the unstandardized beta coefficient for the education variable as shown on the SPSS printout? Explain what this unstandardized beta coefficient means?
Turn in the SPSS printout and your answers to the questions. Keep in mind that your results and answers should mirror what is reported in the textbook.
Code the following variables into SPSS. The first variable is the individual’s sex [M = Male F = Female (Female is the reference category)] and the second variable is the individual’s religion [C = Catholic, P = Protestant, J = Jewish, and M = Muslim (Muslim is the reference category)].
1. M, C 2. M, P 3. M, J 4. M, M 5. M, C 6. F, P 7. F, J 8. F, M 9. F, C 10. F, P 11. M, J 12. M, M 13. M, C 14. M, P 15. M, J 16. F, M 17. F, C 18. F, P 19. F, J 20. F, M 21. M, C 22. M, P 23. M, J 24. M, M 25. M, C 26. F, P 27. F, J 28. F, M 29. F, C 30. F, P 31. M, J 32. M, M
Once the new variables are coded into SPSS, you need to run a regression analysis with the following independent variables: education, sex and religion. The dependent variable is income.
Interpret the unstandardized betas for all the independent variables and the intercept.
Interpret the R2 for the overall model.
What is the adjusted R2 for the model?
What variable has the greatest relative impact among the independent variables (the largest standardized beta coefficient)?
Run a regression equation with education as the independent variable. Then add the sex variable to the equation and check the change in R2. Why are there two changes in R2 reported in the SPSS output? What does the first reported change in R2 mean? What does the second reported change in R2 mean?
Run a regression equation with education as the independent variable. Then add the religion variables to the equation and check the change in R2. Why are there two changes in R2 reported in the SPSS output? What does the first reported change in R2 mean? What does the second reported change in R2 mean?
the whole paper should be consisting of 5 calculations + 1 page ( academic paper writing )
