SOCI 271 Chapter Notes - Chapter 4: Simple Random Sample, Dependent And Independent Variables, Categorical Variable
23 Oct 2016
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Response variable: measures the outcome of interest. Response variable: whether or not the subject has cancer. Explanatory variable: the amount of cell phone use. Observational study: merely observes rather than experiments with the study subjects: also called nonexperimental. Experimental study: assigns to each subject a treatment and then observes the outcome on the response variable. Lurking variable: is a variable, not observed in the study, that influences the association between the response and explanatory variables due to its own association with each of those variables. You cannot establish cause and effect in observational studies. Sample survey: selects a sample of subjects from a population and collects data from them. Sampling frame: the list of subjects in the population from which the sample is taken. Simple random sample: of n subjects from a population is one in which each possible sample of that size has the same chance of being selected.
