POLSCI 3N06 Lecture : Political Science 3N06 Semester II 2014 Lecture 5a Sampling distributions.docx
5 Apr 2014
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Political science 3n06 2014 lecture 5a sampling distributions. Inferential statistics enable you to generalize from samples to populations. To calculate how probable it is that your sample results are true for the larger population from which the sample was drawn. Note: inferential statistics are only valid for samples that are representative of the larger population: i. e. those that have been gathered by epsem. If the sample is not representative, then you cannot expect inferential statistics to produce valid results regarding population parameters. To go from sample statistics to estimations of population parameters: the population this is the group about which we want to generalize. Different symbols are used depending upon which distribution you are referring to: Sampling distribution: the theoretical, probabilistic distribution of a statistic for all possible samples of a given size (n) . A) it is normal in shape if the population is normal.
