Assignment 4: SPSS and Correlation
Due at start of class on 8 February, 2006. Name:

Use SPSS and the standard class data set to answer the following questions. You may want to refer to the original questionnaire. Each question is worth one point unless otherwise indicated.

1. Use SPSS to produce a scatter plot of the variable points and GPA.  Based on the scatterplot, is the assumption of linearity met? Yes No
2. Based on the scatter plot that you just produced, is the assumption of a non-truncated range met? Yes No
3. Use SPSS to calculate the Pearson's product moment correlation coefficient between points and GPA.  What is the value of r?
4. Interpret the correlation coefficient you found in the previous step (i.e. discuss what its sign and magnitude tell you in relation to your answers to questions 1 and 2.):
5. What is the value of the coefficient of determination for points and GPA
6. Use SPSS to produce a scatter plot of younger and GPA. Based on the scatterplot, is the assumption of linearity met? Yes No
7. Based on the scatter plot that you just produced, is the assumption of a non-truncated range met? Yes No
8. Use SPSS to calculate the Pearson's product moment correlation coefficient between younger and GPA. What is the value of r?
9. Interpret the correlation coefficient you found in the previous step (i.e. discuss what its sign and magnitude tell you in relation to your answers to questions 7 and 8.):
10. What is the value of the coefficient of determination for younger and GPA

Save ALL of your SPSS output to a file named as your last name. Email me the SPSS output file (the .spo file).

When you are all done with the questions, click on the submit button. Your answers are not submitted unless you click on the button, receive confirmation that your answers have been received, and email your SPSS output to me.