S W 318 Lecture Notes - Lecture 5: Sampling Distribution, Standard Deviation, Statistical Parameter
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Population: a group that includes all of the cases in which the researcher is interested. Sample: a relatively small subset from a population. Parameter: a measure, such as mean or standard deviation, used to describe a population. Statistic: a measure such as mean of standard deviation used to describe a sample distribution, p. A method of sampling that enables the researcher to specify for each case in the population the probability of its inclusion in the sample. A sample designed in such a way as to ensure that: every member of the population has an equal chance of being chosen and, every combination of n members has an equal chance of being chosen. A method of sampling obtained by: dividing the population into subgroups based on one or more variables central to our analysis and then. 2/21/17: drawing a simple random sample from each of the subgroups.
