A clinical researcher wants to compare mean blood glucose levels across four treatment groups. The data are normally distributed and variances are equal. Which statistical test is MOST appropriate?
- A Student's t-test
- B Chi-square test
- C One-way ANOVA ✓
- D Kruskal-Wallis test
Correct answer: C. One-way ANOVA
Explanation
One-way ANOVA is the appropriate test for comparing means of a continuous, normally distributed variable across three or more groups with equal variances (homoscedasticity). Student's t-test is limited to two groups. Chi-square tests categorical data. Kruskal-Wallis is the non-parametric equivalent used when normality is violated.
Reference: Park's Textbook of Preventive and Social Medicine, 27th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
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