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90th percentile is probably used so that outliers (Bill Gates) don't overly skew the bar charts. I don't understand your final question though. 90th percentile
by kemitche 9y ago
90th percentile is probably used so that outliers (Bill Gates) don't overly skew the bar charts.
I don't understand your final question though. 90th percentile means that, for the data set, 90 percent earned less and 10 percent earned more. The end of the bar is the 90th percentile mark.
- kpwagner 9y agoAh, okay. That kind of makes sense. If that is true, then the writer's comment about quartiles is wrong--or at least misleading. The outliers thing came to my mind too; it's such a big factor.