Excavation Sample Size: A Cautionary Tale

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Abstract
Frequently, only five percent or less of a midden site is excavated for environmental-analysis purposes before it is turned over to the bulldozers for destruction. Such exceptionally small sample sizes have become accepted in cultural-resource-management work as adequate for gaining a good understanding of the chronology and cultural activities at a site. This assumption was tested by the author with a 63 percent excavation sampling fraction from a southern California midden. The data indicate that a far-from-complete understanding of a site may result from small sampling fractions and that more carefully designed sampling strategies and statistical manipulation of the data may not overcome this problem.