A study comparing mean hemoglobin levels in three dietary groups (vegetarian, vegan, omnivore) uses which statistical test?

• A Chi-square test
• B Paired t-test
• C Mann-Whitney U test
• D One-way ANOVA ✓

Explanation

ANOVA (Analysis of Variance) is used to compare means across three or more independent groups when the data is normally distributed and measured on a continuous scale. Chi-square is for categorical data; paired t-test is for two related groups; Mann-Whitney U is the non-parametric alternative for two groups.

Reference: Park's Textbook of Preventive and Social Medicine, 27th ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

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