Free Statistical Software

http://freestatistics.altervista.org/
http://davidmlane.com/hyperstat/Statistical_analyses.html
http://maltman.hmdc.harvard.edu/socsci.shtml

Introduction to Statistics

https://www.udacity.com/course/intro-to-statistics--st101
http://icp.giss.nasa.gov/education/statistics/

Statistics Tutorials

http://faculty.chass.ncsu.edu/garson/PA765/statnote.htm
http://www.sjsu.edu/faculty/gerstman/StatPrimer/

Glossary / Importance of Statistics

http://www.statsoft.com/textbook/glosfra.HTML
http://statweb.byu.edu/

Free Book Online Detailed / Short

http://www.statsoft.com/textbook/stathome.html
http://www.jerrydallal.com/LHSP/LHSP.HTM

Statistics / Co / Portal / Learning / Why

http://en.wikipedia.org/wiki/Statistics
http://spss.co.in/
http://www.statsci.org/
http://en.freestatistics.info/learning.php
http://www.ilr.cornell.edu/academics/SocialStatistics/Why-Statistics.html