What statistical test should I do? How many variables? 1 variable 2 variables Qualitative Quantitative 1 quantitative & 1 qualitative 2 qualitative 2 groups > 2 groups Parametric Nonparametric One-proportion test Chi-square goodness of fit test One-sample Student's t-test One-sample Wilcoxon test > 2 variables 2 groups for each variable > 2 groups for at least one variable Independent samples Paired samples 2 paired samples > 2 paired samples Expected frequencies < 5 Expected frequencies >= 5 McNemar's test Cochran's Q test Fisher's exact test Chi-square test of independence Quantitative dependent variable 2 quantitative Parametric Nonparametric Pearson correlation Spearman's rank correlation @statsandr Equal population variances Unequal population variances Student's t-test for 2 independent samples Welch's t-test for 2 independent samples Paired samples Mann-Whitney U test > 2 groups Binary logistic regression Multinomial logistic regression > 2 groups Independent samples Nonparametric 2 groups Number of groups/samples to compare? 2 groups Parametric Multiple linear regression Qualitative dependent variable Parametric Student's t-test for paired samples Independent samples Nonparametric Wilcoxon signed-rank test Parametric Equal population variances Unequal population variances One-way ANOVA Welch's ANOVA Paired samples Nonparametric Parametric Nonparametric Kruskal-Wallis test Repeated measures ANOVA Friedman test