This document provides an introduction to the course "Design and Analysis of Clinical Trials". It discusses how clinical research uses statistics to investigate medical treatments and assess benefits of therapies. Statistics allow for reasonable inferences from collected data despite variability in patient responses. The course covers fundamental concepts of clinical trial design and analysis including phases of trials, randomization, sample size, treatment allocation, and ethical considerations. It aims to teach students how to generalize trial results to populations and combine empirical evidence with medical theory using statistical methods.