Focusing on everyday applications as well as those of scientific research, this classic of modern statistical methods requires little to no mathematical background. Readers develop basic skills for evaluating and using statistical data. Lively, relevant examples include applications to business, government, social and physical sciences, genetics, medicine, and public health. "W. Allen Wallis and Harry V. Roberts have made statistics fascinating." — The New York Times "The authors have set out with considerable success, to write a text which would be of interest and value to the student who, not concerned primarily with statistical technics, must understand the nature and methodology of the subject in order to make proper use of its results." — American Journal of Public Health and the Nation's Health "This book is a distinct and important contribution to the text literature in statistics for social scientists and should be given careful consideration by sociologists." — American Sociological Review.