Interventional study is used for:-: (A) Hypothesis Formulation, (B) Hypothesis Testing, (C) Hypothesis Confirmation, (D) Hypothesis Manipulation
Answer is C. CLASSIFICATION OF EPIDEMIOLOGICAL STUDIES: 1. OBSERVATIONAL STUDIES: - Descriptive studies - Hypothesis formation is done - Analytical studies - Hypothesis testing is done by coho study/ case-control / cross-sectional/ Ecological studies. 2. EXPERIMENTAL/ INTERVENTIONAL STUDIES: - Hypothesis confirmation is done - Done by clinical trials/ RCT's / Field trials/ Community trials.