| Question | Answer |
| Chi- squared | Independent measures + Nominal data or Correlation + Nominal data |
| Sign test | Repeated measures/matched pairs + Nominal data |
| Mann-Whitney U | Independent measures + ordinal data |
| Wilcoxen rank | Repeated measures/matched pairs +Ordinal data |
| Spearman's rho | Correlation + Ordinal data |
| Unrelated t-test | Independent measures + Interval/ratio data |
| Related t-test | Repeated measures/matched pairs + Interval/ratio data |
| Pearson's product moment | Correlation + Interval/ratio data |
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