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Random stratified (2): Rows are chosen at random within N strata defined by the user. In each stratum, the number of sampled observations is proportional to the relative frequency of the stratum.
Systematic from random start: From the j'th observation in the initial table, an observation is extracted every k observations to be used in the sample. j is chosen at random from among a number of possibilities depending on the size of the initial table and the size of the final sample. k is determined such that the observations extracted are as spaced out as possible
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THE LEADING DATA ANALYSIS AND STATISTICAL SOLUTION FOR MICROSOFT EXCEL®
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