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Introductory Statistics with Randomization and Simulation offers a novel introduction to statistics at the college level. Extra benefits of Introductory Statistics with Randomization and Simulation vs the expensive alternatives:

Every student can access the textbook, even before the course starts, for free.
Black-and-white paperbacks are sold at-cost on Amazon for $8.50.
Students have forever access to the textbook PDF.
We offer a variety of free supplemental resources, including videos and software labs, on openintro.org.

Teachers: register at openintro.org/register to get access to teacher-only content, including the option to get a free desk copy or access to exercise solutions. (Sorry to non-teachers, we don't currently offer exercise solutions beyond our Verified Teachers. Details on our reasoning are here.)

FYI: A new edition of this book and with a new title is in development (openintro.org/book/ims). Those with access to this title, Introductory Statistics with Randomization and Simulation, on Leanpub will have automatic access to this new title when that book exits the development phase. The book will remain free with an optional contribution when updated, and the original book (ISRS) will be included as a free \"Extra\".

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Kick off your book project in 3 hours! Live workshop on Zoom. You’ll leave with a real book project, progress on your first chapter, and a clear plan to keep going. Saturday, May 16, 2026. Learn more…

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