Bancroft's Introduction to Biostatistics [antikvár]

Preface to the Second Edition In revising tiiis textbook 12 years after its first appearance, we have chosen to follow the outline and approach of the First Edition as closely as possible. We have tried to retain the spirit of the original with its emphasis on application of biostatistics to medical problems. The attention to small sample procedures and computational instruction has been increased. The t test is presented early in the text; the F test is introduced and; accurate computational formulae are stressed. Growing familiarity with statistics, as evidenced by the medical literature in the last decade, has motivated the inclusion of discussions of relative risk, measures of effectiveness, and design of experiments. We especially admire the late Dr. Bancroft's choice of pertinent clinical examples and although some have been updated, the bulk of her problems have been kept. A list of computational answers has been added. Like Dr. Bancroft, we hope the book will be useful for self-study as well as in the classroom. We are indebted to the Literary Executor of the late Sir Ronald A. Fisher, F.R.S., to Dr. Frank Yates, F.R.S., and to Oliver & Boyd Ltd., Edinburgh, for permission to reprint Table C from their book Statistical Tables for Biological, Agricultural and Medical Research. Also we wish to thank W. G. Cochran, G. M. Cox, and John Wiley & Sons Inc., New York, for permission to reprint Table E from their book Experimental Designs. Philadelphia, Pennsylvania Johannes Ipsen Polly Feigl