Popular Tests

Chi Square / Solved
http://en.wikipedia.org/wiki/Chi-squared_distribution
http://www.enviroliteracy.org/pdf/materials/1210.pdf
t-test - z- test
http://www.differencebetween.net/miscellaneous/difference-between-z-test-and-t-test/
ANOVA
http://en.wikipedia.org/wiki/Analysis_of_variance
F-test
http://en.wikipedia.org/wiki/F-test
Factor analysis (Principal Component Analysis)
http://en.wikipedia.org/wiki/Factor_analysis
http://www.statsoft.com/textbook/principal-components-factor-analysis/
Regression analysis / Excel / SPSS
http://en.wikipedia.org/wiki/Regression_analysis
http://www.jeremymiles.co.uk/regressionbook/extras/appendix2/excel/
http://www.ats.ucla.edu/stat/spss/webbooks/reg/default.htm

Multivariate statistics / Tutorial / Applied / Tube
http://en.wikipedia.org/wiki/Multivariate_statistics
http://www.math.ucdavis.edu/~tracy/talks/oldtalks/SAMSItutorial.pdf
http://www.stat.wvu.edu/~jharner/courses/stat541/mva.pdf
https://www.youtube.com/results?q=multivariate+analysis+in+statistics  

Hypothesis / Types / Writing / Test / Which / Errors

http://en.wikipedia.org/wiki/Hypothesis
(Hypothesis is Set of Assumtions which is tested for its Validity)
http://www.d.umn.edu/~wfleisch/educ_8017/BASIC%20TYPES%20OF%20HYPOTHESES.pdf
http://www.accessexcellence.org/LC/TL/filson/writhypo.php

http://www.stats.gla.ac.uk/steps/glossary/hypothesis_testing.html

http://www.isixsigma.com/tools-templates/hypothesis-testing/hypothesis-testing-fear-no-more/

http://www.intuitor.com/statistics/T1T2Errors.html