A physician is evaluating a new diet for her male patients with a family history of heart disease. To test the effectiveness of this diet, 16 patients are placed on the diet for 6 months. Their triglyceride levels and weights are measured before and after the study, and the physician wants to know if either set of measurements has changed.

This example uses the file dietstudy.sav. Use Paired-Samples T Test to determine whether there is a statistically significant difference between the pre- and post-diet weights and triglyceride levels of these patients.