A study comparing mean blood glucose levels among three diet groups (low-carb, Mediterranean, standard) should use which statistical test?
- A Student's unpaired t-test
- B One-way ANOVA ✓
- C Paired t-test
- D Chi-square test
Correct answer: B. One-way ANOVA
Explanation
One-way ANOVA (Analysis of Variance) is used to compare means of three or more independent groups with a continuous normally distributed outcome; it tests whether at least one group mean differs significantly. Student's t-test is only valid for comparing two group means. Chi-square is for categorical (frequency/proportion) data.
Reference: Park's Textbook of Preventive and Social Medicine, 27th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
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