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And Spss Applications: Ordinal Data: Nonparametric Statistical Analyses

And Spss Applications: Ordinal Data: Nonparametric Statistical Analyses

Ordinal data has a clear order/ranking but unequal or unknown intervals between values.

| Parametric (Not suitable) | Nonparametric (Suitable) | |---------------------------|--------------------------| | Pearson correlation | Spearman’s rho | | Independent t-test | Mann-Whitney U | | Paired t-test | Wilcoxon signed-rank | | One-way ANOVA | Kruskal-Wallis H | | Repeated-measures ANOVA | Friedman test | A. Compare two independent groups Test: Mann-Whitney U Example: Compare pain scores (ordinal) between Treatment vs. Placebo groups. Ordinal data has a clear order/ranking but unequal