Non-parametric tests

Useful reviews of Non-parametric tests

http://www.une.edu.au/WebStat/unit_materials/c6_common_statistical_tests/nonparametric_test.html

http://www.graphpad.com/support/faqid/1790/


http://www.healthknowledge.org.uk/public-health-textbook/research-methods/1b-statistical-methods/parametric-nonparametric-tests

http://changingminds.org/explanations/research/analysis/parametric_non-parametric.htm