You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is What is the major advantage of randomised sample in a clinical trial? and explain in detail?
Randomization is a statistical procedure by which the selection bias is reduced and thus the paicipants are allocated into study and control groups. By randomization, there is equal distribution of factors between the two groups and thus comparison is allowed. Although randomization makes the groups comparable, it does not 'ensure' comparability. Ref: Park's Textbook of Preventive and Social Medicine, 19th Edition; Pages 77 - 78