§ 1.482-1(e)(2)(iii)(C) Interquartile range.

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For purposes of this section, the interquartile range is the range from the 25th to the 75th percentile of the results derived from the uncontrolled comparables. For this purpose, the 25th percentile is the lowest result derived from an uncontrolled comparable such that at least 25 percent of the results are at or below the value of that result. However, if exactly 25 percent of the results are at or below a result, then the 25th percentile is equal to the average of that result and the next higher result derived from the uncontrolled comparables. The 75th percentile is determined analogously.

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