This chapter presents an introduction to biostatistics biostatistics is the application of statistical methods to the biological and life sciences statistical methods include procedures for 1 collecting data 2 presenting and summarizing data and 3 drawing inferences from sample data to a population. Biostatistics is a branch of biological science which deals with the study and methods of collection presentation analysis and interpretation of data of biological research biostatistics is also called as biometrics since it involves many measurements and calculations. Introduction these notes are intended to provide the student with a conceptual overview of statistical methods with emphasis on applications commonly used in pharmaceutical and epidemiological research we will briefly cover the topics of probability and descriptive statistics followed by detailed descriptions of widely used inferential . biostatistics the tools of statistics are employed in many fields business education psychology agriculture economics etc when the data analyzed are derived from the biological science and medicine we use the term biostatistics to distinguish this particular application of statistical tools and concepts