Hi ! It is a nice introduction to Bayesian Statistics and Statistics made freely available by its author: Allen B. Downey
Follows the links down below:
- http://greenteapress.com/wp/think-bayes/
- http://www.greenteapress.com/thinkbayes/html/index.html
- http://thinkbayes.com/thinkbayes.pdf
- http://greenteapress.com/wp/think-stats-2e/
- http://greenteapress.com/thinkstats2/thinkstats2.pdf
- http://greenteapress.com/thinkstats/index.html
- http://greenteapress.com/thinkstats/thinkstats.pdf
He made also available a few other interesting text books for programming and other stuff.