It is a value calculated from the sample values only.
It is a value calculated from the sample values only.
It is a value calculated from the sample values only.
It is a value calculated from the sample values only.
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A representative sample is one where the statistics of the sample are the same as the statistics for the parent population.
Information obtained from the sample can be extrapolated to the whole population using statistics.
The sample mean may differ from the population mean, especially for small samples.
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Inferential statistics.