Non-parametric equivalent of the paired t-test, used when data does not follow normal distribution and involves matched pairs, is:
- A Mann-Whitney U test
- B Kruskal-Wallis test
- C Wilcoxon signed-rank test ✓
- D Spearman rank correlation
Correct answer: C. Wilcoxon signed-rank test
Explanation
The Wilcoxon signed-rank test is the non-parametric equivalent of the paired t-test, used for matched pairs or repeated measurements when normality cannot be assumed. The Mann-Whitney U test is the non-parametric equivalent of the independent t-test; Kruskal-Wallis is the non-parametric equivalent of one-way ANOVA for more than two independent groups; Spearman rank correlation measures association between two ranked variables.
Reference: Park's Textbook of Preventive and Social Medicine, 27th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
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