Ruth Bernstein & Stephen Bernstein 
Schaum’s Outline of Elements of Statistics II: Inferential Statistics [PDF ebook] 

Picking up where Elements of Statistics I leaves off, this study guide clearly explains discrete probability distribution, including normal, continuing, sampling, and other distributions. The practical, cross-referenced problems throughout are drawn from such fields as anthropology, biology, business, government, medecine, psychology and sociology, and the solutions are fully explained. A perfect supplement to the leading textbooks, students will also find this book ideal for independent study. Supplementary questions aid self-testing.