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
https://onlinestatbook.com/Online_Statistics_Education.pdf
David Lane in Rice University, Houston on 2003-01-01
College Algebra 1st Edition
Written by
Jay Abramson
Published by
https://openstax.org/details/books/college-algebra
OpenStax, Rice University in 6100 Main Street MS375 Houston, Texas 77005 on 2015-01-01
OpenIntro Statistics 4th Edition
Written by
David Diez, Mine Cetinkaya-Rundel, Christopher D Barr
Published by
https://leanpub.com/openintro-statistics
OpenIntro in on 2019-11-12
Introductory Statistics 1st edition
Written by
Barbara Illowsky, Susan Dean
Published by
https://openstax.org/books/introductory-statistics/pages/1-introduction
OpenStax in Houston, Texas on 2013-09-19