The Khanacademy web site, in statistical section, provides very well done video tutorials modeling a class on several statistical topics from descriptive stat to regression and inferential stat. Khan Academy is a non-profit educational website created in 2006 by educator Salman Khan to provide a free, world-class education for anyone, anywhere. The website features thousands of educational resources, including a personalized learning dashboard, over 100,000 exercise problems, and over 4000 micro lectures via video tutorials stored on YouTube teaching mathematics, history, healthcare, medicine, finance, physics, general chemistry, biology, astronomy, economics, cosmology, organic chemistry, American civics, art history, macroeconomics, microeconomics, and computer science. All resources are available for free to anyone around the world. Khan Academy reaches about 10,000,000 students per month and has delivered over 300,000,000 lessons. Registration not required.