A researcher measures fasting blood glucose in 30 patients before and after a 12-week exercise program. The appropriate test to compare the mean glucose values is:
- A Independent samples t-test
- B Paired t-test ✓
- C Chi-square test
- D One-way ANOVA
Correct answer: B. Paired t-test
Explanation
The same subjects are measured twice (before and after), creating paired or dependent observations. The paired t-test analyzes the mean of the within-subject differences. The independent samples t-test assumes two separate groups. Chi-square tests association between categorical variables. One-way ANOVA compares means across three or more independent groups.
Reference: Park's Textbook of Preventive and Social Medicine, 26th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
Written and medically reviewed by the StethoPrep medical team.