| Method 1 | Method 2 | Method 3 |
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Assumptions | Normally distributed continuous data | Non-normally distributed continuous data | Ordinal data, constant and relatively small odds ratio, large sample size |
Summary Measure | Mean and mean difference | Median | Odds Ratio (OR Ordinal ) |
Hypothesis test | Two-independent samples t-test | Mann-Whitney U test | Mann-Whitney U test or equivalent proportional odds model |
Effect Size |
| p Noether = Pr(Y >X) |
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Sample size formulae |
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