POLS 2400 Chapter Notes - Chapter 6: Standard Deviation, Sampling Distribution, Frequency Distribution
13 Dec 2016
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Document Summary
Population- group consists of a set of individuals who share at least one characteristic. Sample- a smaller number of individuals from the population. Creates equal opportunity for everyone to be represented in the sample. Equal-probability characteristic of random sampling indicates that every member of the population must be identified before the random sample is drawn " Can use a table of numbers to make this process easier. Generates a series of numbers having no particular pattern or order. Mean of the sample - x with a line above it. Standard deviation of a sample - s. There will always be a difference between the sample and the population. A sample mean will hardly ever be exactly the same as the population standard deviation. Frequency distributions of raw scores can be obtained from both samples and populations. Sampling distributions of means- a frequency distribution of a large number of random sample means that have been drawn from the same population.
