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A sample selected so that each item or person in the population has the same of being included

Simple Random Sample


A random starting point is selected, and then every kth member fo the population is selected.

Systematic Random Sample


A population is divided into subgroups ,called strata, and a sample is randomly selected from each stratum.

Stratified Random Sample


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

Cluster Sample


The difference between a sample statistic and its corresponding population parameter.

Sampling Error


A probability distribution of all possible sample means of given sample size.

Sampling Distribution of the Sample Mean
