What is the best statistical test to compare two groups?
Choosing a statistical test
| Type of Data | ||
|---|---|---|
| Compare two unpaired groups | Unpaired t test | Fisher's test (chi-square for large samples) |
| Compare two paired groups | Paired t test | McNemar's test |
| Compare three or more unmatched groups | One-way ANOVA | Chi-square test |
| Compare three or more matched groups | Repeated-measures ANOVA | Cochrane Q** |
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