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A sample selected so that each item or person in the population has the same of being included
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Simple Random Sample
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A random starting point is selected, and then every kth member fo the population is selected.
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Systematic Random Sample
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A population is divided into subgroups ,called strata, and a sample is randomly selected from each stratum.
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Stratified Random Sample
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A population is divided into clusters using naturally occurring geographic or other boundaries. Then, clusters are randomly selected and a sample is collected by randomly selecting from each cluster
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Cluster Sample
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The difference between a sample statistic and its corresponding population parameter.
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Sampling Error
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A probability distribution of all possible sample means of given sample size.
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Sampling Distribution of the Sample Mean
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