Epi Info is a series of freely-distributable tools and utilities for Microsoft Windows for use by public health professionals to conduct outbreak investigations, manage databases for public health surveillance and other tasks, and general database and statistics applications. It enables physicians, epidemiologists, and other public health and medical officials to rapidly develop a questionnaire or form, customize the data entry process, and enter and analyze data.

Introduction to statistical software – Epi Info

Also checkout:  Full Biostatistics Notes  –  Pharm.D Notes for Other Subjects