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Category Archives: Research

Several Major Distributions of Survival Function

03-Sep-17

Exponential Distribution The simplest and most important distribution in survival studies is the exponential distribution. In the late 1940s, researchers began to choose the exponential distribution to describe the life pattern of electronic systems. The exponential distribution has since continued to play a role in lifetime studies analogous to that of the normal distribution in […]

Why the Odds Ratio Can Be Used as an Estimate for Relative Risk in a Case-Control Study

10-Jun-17

The data in a case-control study represent two samples: The cases are drawn from a population of people who have the disease and the controls from a population of people who do not have the disease. The predictor variable (risk factor) is measured, and the results can be summarized in a 2 X 2 table […]