This textbook is intended for use in introductory biostatistics courses for health science, nursing, and biology students. It deals with research designs used for collecting data, methods for summarizing data, and testing hypotheses in health and related fields. The emphasis is on illustrating how statistics are generated and used by practitioners in health fields and interpreting crucial aspects of journal articles. Concepts are stressed rather than the usual computational methods. Every major concept is accompanied by an exercise and correct answers, and these form an integral part of the text.