Supplemental Digital Content - Lippincott Williams & Wilkins

Percentiles: The kth percentile is a value below which k% of the data values fall. Some percentiles have special names: 75th percentile = 3rd or upper quartile = Q3. 25th percentile = 1st or lower quartile = Q1. 50th percentile = Median. The Interquartile Range (IQR) = Q3 – Q1. ................
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