A percentile or quartile measure is used for measuring dispersion. Obese children are classified as being equal to or greater than the 95th percentile. Children with a BMI between the 85th and 95th percentile are considered to be overweight. Billing is typically done based on the 95th percentile. Before puberty, the 99th percentile of QTc values is 460 milliseconds. Each standard deviation represents a fixed percentile. This minimum is determined at whichever score yields the 96th percentile nationally. Specifically goals should be set in the 90th percentile of difficulty. If you're black, it's good enough to catapult you into the 95th percentile. The scores attained must be at or above the twenty-third percentile. There is no standard function for a weighted percentile. Specifically, an individuals goal should be set at the 90th percentile of difficulty. A score above 1580 was equivalent to the 99.9995 percentile. The highest possible percentile is 99. Affluence and economic standing within society are often expressed in terms of percentile ranking.