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 Experimental studies are meant to - and explain in detail?
Experimental studies involve an active attempt to change a disease determinant or the progress of a disease and are similar in design to experiments in other sciences. The major experimental design is randomized control trials. Field trials and community trials are other experimental studies. (refer pgno:63 park 23 rd edition)