This book is not for people who do not understand statistics because there are typos in the book on important things such as definitions, answers to stats formulas, and in addition, the associated on-line grading chapter questions. Page 39 is just one example. The explanation of a Z-score has a typo. Below that, the example formula of a T-score is incorrect. Trying to figure this stuff out has been beyond frustrating. I do not recommend this book until they fix the published errors.
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