Suppose we are studying blood pressure in humans based on a random sample from a specific population, say, inhabitants of some larger city. The very first step in such a study may be to get a summary of the level and variation of blood pressure, subject to criteria such as ethnicity, gender or age. The purpose of studying blood pressure may be to establish normal references to serve as future guidelines for when to start treatment for either too high or too low a blood pressure.
KeywordsHazard Rate Primary Biliary Cirrhosis Fetal Death Linear Predictor Body Mass Index Group
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