Biostatistics or Biometrics is a growing filed of statistics. The word 'Biometrics' derived from two Greek Words Bios (Life) and Matron (measurement). Thus Biometrics means measurement of life. Biostatistics may be defined as the quantitative analysis of biological phenomena based on the concurrent development of theory and observation related by appropriate methods of statistical inference .Chapter-I is any introductory one. It contains the general introduction about Biostatistics.Chapter-II describes the various aspects of Bioassays such as meaning, history and structure of Bioassays.Chapter-III deals with the existing univariate statistical tools in Biostatistics. It presents a brief review about basic statistical tools for Biostatistics.Chapter-IV gives a brief review about the existing Inferential Multivariate statistical tools for Biostatistics .Chapter-V proposes some advanced and new statistical techniques for Biostatistics such as modified Trend tests for Biostatistics; Chapter-VI epitomizes the conclusions based on the present book . Besides Conclusions.Several relevant research articles have been presented under the title 'BIBLIOGRAPHY'.