Introduction to Probability

This introductory probability book, published by the American Mathematical Society, is available from AMS bookshop. It has, since publication, also been available for download here in pdf [...]

Introduction to Statistical Thought
This eBook is intended as an upper level undergraduate or introductory graduate textbook in statistical thinking with a likelihood emphasis for students with a good knowledge of calculus and the ability to think abstractly. By “statistical thinking” is meant a focus on ideas that statisticians care about as opposed to technical [...]

Here is a good free statistics textbook available in PDF format.

Introduction to Statistical Thought

The book is intended as an upper level undergraduate or introductory graduate textbook in statistical thinking with a likelihood emphasis for students with a good knowledge of calculus and the ability to think abstractly. By “statistical thinking” is meant a focus on [...]

NIST/SEMATECH e-Handbook of Statistical Methods
The NIST/SEMATECH e-Handbook of Statistical Methods 1, is a Web-based book whose goal is to help scientists and engineers incorporate statistical methods into their work as efficiently as possible. Ideally it will serve as a reference that will help scientists and engineers design their own experiments and carry out the [...]

Dr. Arsham’s Statistics Site

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Textbook Revolution: Statistical Thinking for Managerial Decisions
Here’s an entire statistics book on one long page of simple HTML text, with hyperlinks taking you up and down the page. If you print it out, you’ll get a book 172 pages long. The setup makes it easy to search the site using CTRL-F [...]

Benford’s Law

Benford’s law predicts a decreasing frequency of first digits, from 1 through 9. Every entry in data sets developed by Benford for numbers appearing on the front pages of newspapers, by Mark Nigrini of 3,141 county populations in the 1990 U.S. Census and by Eduardo Ley of the Dow Jones Industrial Average from 1990-93 [...]