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We use open source textbooks to create questions stored on our question repository. These are the textbooks that we currently support:

Online Statistics Education: A Multimedia Course of Study 1st Edition

Written by

David M. Lane, David Scott, Mikki Hebl, Rudy Guerra, Dan Osherson, and Heidi Zimmer

Published by

David Lane in Rice University, Houston on 2003-01-01

https://onlinestatbook.com/Online_Statistics_Education.pdf

College Algebra 1st Edition

Written by

Jay Abramson

Published by

OpenStax, Rice University in 6100 Main Street MS375 Houston, Texas 77005 on 2015-01-01

https://openstax.org/details/books/college-algebra

OpenIntro Statistics 4th Edition

Written by

David Diez, Mine Cetinkaya-Rundel, Christopher D Barr

Published by

OpenIntro in on 2019-11-12

https://leanpub.com/openintro-statistics

Introductory Statistics 1st edition

Written by

Barbara Illowsky, Susan Dean

Published by

OpenStax in Houston, Texas on 2013-09-19

https://openstax.org/books/introductory-statistics/pages/1-introduction

Introduction to Probability and Statistics 2nd

Written by

Tim Swartz

Published by

Pearson in on 2013-05-01

Written by

Published by

in on 2026-08-06