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Preface Online Resources

OpenIntro is focused on increasing access to education by developing free, high-quality education materials. In addition to textbooks, we provide the following accompanying resources to help teachers and students be successful.

All of these resources can be found at:

We also have improved the ability to access data in this book through the addition of Appendix A, which provides additional information for each of the data sets used in the main text and is new in the Second Edition. Online guides to each of these data sets are also provided at and through a companion R package.