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Unformatted text preview: Chapter 6 Sampling Distributions 6.1 Sampling Distributions Definition 6.1 Parameter: A parameter is a numerical descriptive measure of a popula- tion. For examples and are parameters. Definition 6.2 Statistic: A sample statistic is a numerical descriptive measure of a sample. For examples x and s are statistics. In real life, most of the cases, and are unknown. We estimate and by x and s respectively. Definition 6.3 Sampling Distribution: The probability distribution of a statistic that results when random samples of size n are repeatedly drawn from a given population is called the sampling distribution of the statistic. The sample mean, median, and standard deviation and other numerical descriptive measures compute from the sample can be used not only to describe the sample but also to make inference about the corresponding population parameters in the form of estimates or tests of hypothesis. Extra Example 1: Consider a population of N = 5 elements whose values are: 6, 9, 12, 15, and 18....
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This note was uploaded on 09/15/2011 for the course STA 2023 taught by Professor Mcguckian during the Fall '08 term at FIU.
- Fall '08