Links
Khan Academy (Statistics):
http://www.khanacademy.org/?video=#statistics
Chapter 24
Hypothesis Testing: Does Chance explain the Results? (P.B. Stark, UC Berkeley)
http://www.stat.berkeley.edu/~stark/SticiGui/Text/testing.htmÂ
Chapter 25
Does Treatment Have an Effect? (P.B. Stark, UC Berkeley)
http://www.stat.berkeley.edu/~stark/SticiGui/Text/experiments.htm