CAST contains several alternative e-books that cover the material in an introductory statistics course. The 'business' e-book uses data sets and scenarios from business, commerce and economics. Other e-books use examples from different subject areas.
Since similar statistical methods are used in most application areas, the statistical concepts covered by the different e-books are mostly the same. You can therefore study any CAST e-book to learn these concepts. However you may find it more interesting to read applications that are related to your professional interests if a more relevant CAST e-book has been written.
(On some pages, a menu indicated by a downward-pointing arrow at the top right of the page allows you to view different versions of the page.)