OpenIntro Statistics 3rd Edition
2015, 436 pages
The 3rd Edition has arrived! See what's changed.
Ensure every student can access the course textbook. OpenIntro Statistics is free online, and paperbacks are
The Second Edition remains available in the Archive and on Amazon.
Download the Third Edition PDF
Textbook source files on GitHub
Data sets + R packages
Typos and feedback
Complete an online survey to help us better understand how people use OpenIntro.
Reminder: the Third Edition is the newest edition.
PDF of the Second Edition
Second Edition on Amazon ($9.94)
More Second Edition files
First Edition files (2011, 380 pages)
PDF of the Preliminary Edition (2010, 256 pages)
One-page inference guide
Why do we use 0.05 for a signficance level?
Figure 1.9, enhanced
Regression for nonlinear relationships
More options are coming soon.
Online distribution calculator for normal, t, chi-square
Probability tables: normal, t, and chi-square
Probability tables: source files