In research methodology (very important for MD/PhD proposal writing), Research hypothesis and Statistical hypothesis are related but not the same. 1. Research Hypothesis (Conceptual / Working Hypothesis) A verbal, conceptual statement predicting a relationship between variables. v Written in words (not symbols) v Focus Explains expected relationship Based on theory, prior evidence, or logic v Example High salt intake increases blood pressure among adults in Dharan. Here: Independent variable → Salt intake Dependent variable → Blood pressure It tells the expected relationship , but not how to test statistically. 2️ . Statistical Hypothesis A mathematical statement about population parameters used for statistical testing. v Written in symbols v Includes: Null hypothesis (H₀) Alternative hypothesis (H₁) v Same example converted to statistical form: Research ...
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