These are short tutorials that include quizzes to test your knowledge: http://www.wadsworth.com/psychology_d/templates/student_resources/workshops/stats_wrk.html
This link provides a variety of tools describing common statistical analyses using examples from textbooks: http://www.ats.ucla.edu/stat/spss/examples/default.htm
StatNotes by G.David Garson at NCSU contains one the most helpful and easy to use resources on statistics and research methods. Check it out: http://faculty.chass.ncsu.edu/garson/PA765/statnote.htm
Very nice, moderate length tutorial from Wadsworth that covers both parametric and nonparametric tests. It includes 10 practice exercises and a quiz: http://www.wadsworth.com/psychology_d/templates/student_resources/workshops/stat_workshp/chose_stat/chose_stat_01.html
Decision Tree: http://www.unice.fr/crookall-cours/research/what_stat.htm
Here is one more resource to checkout that also provides definitions of variable types and how these variable types link to statistical procedures: http://www.ats.ucla.edu/stat/stata/whatstat/
Statistical Power Tutorial (complete tutorial with a calculator or software program) http://www.wadsworth.com/psychology_d/templates/student_resources/workshops/stat_workshp/statpower/statpower_01.html
This site contains over 300 free calculators. To find a calculator related to power/sample size, click on “Power, sample size, and experimental designs” on the Table of Contents: http://statpages.org/
This is a popular, free calculator for sample size/power analysis. It contains a help section, user guide, and manual: http://www.psycho.uni-duesseldorf.de/abteilungen/aap/gpower3/
This is an SPSS site that not only helps decide the correct analytical procedure, but gives sample SPSS output:http://www.ats.ucla.edu/stat/spss
From the same helpful folks at UCLA, here is a great place to get lost if there is anything you need to know about SPSS: http://www.ats.ucla.edu/stat/spss/
This site gives assistance with basic functions and calculations: http://www.meadinkent.co.uk/excel.htm
Supported by Microsoft Office, this site contains helps and how-tos: http://office.microsoft.com/en-us/excel/FX100646951033.aspx
“RiceVirtual Lab in Statistics” contains a link to an online textbook. It also contains simulations (great for those who like to “do” rather than simply “read”) and case studies (for when a “real world” example make the concept “real”): http://onlinestatbook.com/rvls.html
http://www.statsoft.com/textbook/stathome.html -this online textbook contains chapters that cover terminology and basic statistics, as well as more complicated types of analytical procedures including MANOVA, cluster analysis, factor analysis, etc.
http://davidmlane.com/hyperstat/ -this online textbook includes elementary chapters (univariate statistics, bivariate statistics, probability, hypothesis testing, etc). It also has a chapter on Power and includes links to free statistical analysis software.
http://www.unice.fr/crookall-cours/research/stats_topics.htm -this online textbook includes a glossary, free software, instructional demos, problems and exercises, and statistics help.