Formulas choosing tests

dependent variable	independent variable	analysis
categorical	categorical	chi-squared test Fisher's exact test
quantitative	quantitative	Pearson correlation
ordinal or quantitative	ordinal or quantitative	Spearman correlation
quantitative	quantitative or categorical (possibly more than one)	linear regression
binary	quantitative or categorical (possibly more than one)	logistic regression

nr. var	paired?	parametric?	what	test
1	-	parametric	mean	one-sample t-test (quantitative data)
		parametric	proportion	one-sample z-test (binary data)
		non-parametric	mean rank	Wilcoxon signed rank (ordinal/quant.data)
			distribution	chi-squared test (categorical data)
			randomness	runs test (binary data)
2	unpaired	parametric	mean	indep sample t-test linear regression
		parametric	proportion	indep. sample z-test logistic regression
		non-parametric	mean rank	Wilcoxon rank sums
			any quantile	sign test
			proportion	chi-squared test Fisher's exact test
	paired	parametric	mean	paired sample t-test
		parametric	proportion	McNemar's test
		non-parametric	any quantile	sign test
		non-parametric	mean rank	Wilcoxon signed-rank
≥3	-	parametric	mean	anova linear regression
≥3	-	non-parametric	mean rank	Kruskal-Wallis