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lecture18_6slides - Statistics 528 Lecture 18 Sampling...

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Statistics 528 - Lecture 18 1 Statistics 528 - Lecture 18 Prof. Kate Calder 1 Sampling Distributions Sampling Distributions A statistic from a random sample or randomized experiment is a random variable . The probability distribution of the statistic is its sampling distribution . Population Distributions The population distribution of a variable is the distribution of its values for all members of the population. The population distribution is also the probability distribution of the variable when we choose one individual from the population at random. Statistics 528 - Lecture 18 Prof. Kate Calder 2 Sampling Distribution for Counts and Proportions Count (X) - number of occurrences of some outcome in a fixed number of observations. Sample Proportion - number of occurrences out of the number of observations. = X/n p ˆ Statistics 528 - Lecture 18 Prof. Kate Calder 3 The Binomial Distribution The Binomial Setting 1. There are a fixed number n of observations. 2. The n observations are all independent.

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lecture18_6slides - Statistics 528 Lecture 18 Sampling...

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