[The following paragraph was effective for periods ended on or after June 25, 1983. It was amended, effective for audits of fiscal years beginning on or after December 15, 2010. See PCAOB Release No. 2010-004.

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To determine the number of items to be selected in a sample for a particular substantive test of details, the auditor should consider the tolerable misstatement, the allowable risk of incorrect acceptance, and the characteristics of the population. An auditor applies professional judgment to relate these factors in determining the appropriate sample size. The Appendix illustrates the effect these factors may have on sample size.