POPM 3240 Lecture Notes - Lecture 5: Simple Random Sample, Confidence Interval, Confounding

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Identify and describe different sampling approaches and methods for obtaining a sample from a population. Describe the factors that must be considered to select appropriately sized samples from a population for surveys and observational studies. Correctly apply sample size formulas to calculate the appropriately sized sample needed to obtain relevant information. Epidemiologic studies require study subjects (humans or animals) in order to investigate and answer questions relating to health and disease. As a result, epidemiologists have developed ways to identify and recruit, or select, study participants to conduct their research. Importantly, a number of different approaches exist for selecting study subjects for this purpose. It is important at this point that we acknowledge the difference between two main approaches: census versus sample. A census involves systematically acquiring and recording relevant information about every member of a given population. The census of canada, conducted by statistics canada, is an example of this.

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