|
Type of Data
|
| Goal | Measurement (from Gaussian Population) | Rank, Score, or Measurement (from Non- Gaussian Population) | Binomial (Two Possible Outcomes) |
| Describe one group | Descriptive Statistics (Mean, SD) | Median, interquartile range | Proportion |
| Compare one group to a hypothetical value | One-sample t test | Wilcoxon test | Chi-square or Binomial test |
| Compare two unpaired groups | Unpaired t test | Mann-Whitney test | Fisher's
test (chi-square for large samples) |
| Compare two paired groups | Paired t test | Wilcoxon test | McNemar's test |
| Compare three or more unmatched groups | One-way ANOVA | Kruskal-Wallis test | Chi-square test |
| Compare three or more matched groups | Repeated-measures ANOVA | Friedman test | Cochrane Q |
| Quantify association between two variables | Pearson correlation | Spearman correlation | Contingency coefficients |
| Predict value from another measured variable | Simple
linear regression or Nonlinear regression |
Nonparametric regression | Simple logistic regression |
| Predict value from several measured or binomial variables | Multiple
linear regression or Multiple nonlinear regression |
Multiple logistic regression |