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N every s starting at k: The sample is built extracting N rows, every s rows, starting at row k
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DATA SAMPLING
Use this tool to generate a subsample of observations from a set of univariate or multivariate data. Available in Excel using the XLSTAT add-on statistical software.
N first rows: The sample obtained is taken from the first N rows of the initial table.
N last rows: The sample obtained is taken from the last N rows of the initial table. This method is only used if it is certain that the values have not been sorted according to a particular criterion which could introduce bias into the analysis
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