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WICH TEST SHOULD I USE (Example in R) Modified from: http://www.ats.ucla.edu/stat/mult_pkg/whatstat/choosestat.html (2016)

Independent Variables	Dependent Variables
	Number	Nature	Test(s)
	1	interval & normal	one-sample t-test
		ordinal or interval	one-sample median
		categorical (2 categories)	binomial test
0 IVs (1 population)		categorical	Chi-square goodness-of-fit
		interval & normal	2 independent sample t-test
		ordinal or interval	Wilcoxon-Mann Whitney test
1 IV with 2 levels (independent			Chi-square test
groups)		categorical	Fisher's exact test
		interval & normal	one-way ANOVA
1 IV with 2 or more levels		ordinal or interval	Kruskal Wallis
(independent groups)		categorical	Chi-square test
		interval & normal	paired t-test
1 IV with 2 levels		ordinal or interval	Wilcoxon signed ranks test
(dependent/matched groups)		categorical	McNema
		interval & normal	one-way repeated measures ANOVA
1 IV with 2 or more levels		ordinal or interval	Friedman test
(dependent/matched groups)		categorical	repeated measures logistic regression
		interval & normal	factorial ANOVA
2 or more IVs (independent		ordinal or interval	ordered logistic regression
groups)		categorical	factorial logistic regression
		interval & normal	correlation
		interval & normal	simple linear regression
		ordinal or interval	non-parametric correlation
1 interval IV		categorical	simple logistic regression
			multiple regression
		interval & normal	analysis of covariance
1 or more interval IVs and/or 1		categorical	multiple logistic regression
or more categorical IVs		categorical	discriminant analysis
1 IV with 2 or more levels	2+
(independent groups)		interval & normal	one-way MANOVA
2+		interval & normal	multivariate multiple linear regression
0		interval & normal	factor analysis
0	2 sets of 2+	interval & normal	canonical correlation