Reply to ERB results - 99th percentile

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[quote=Anonymous][quote=Anonymous]Help me understand!

If child scores 99th percentile on ERB by national standards AND by independent school standards….

What percent of kids at an average private school in DC scores that high? (I understand statistics but I’m not sure if the DC area has 10x as many smart kids as nationally, or does ERB independent school stat only consider local area)?

Also, what percent of kids would you guess score 99th percentile in independent school group (NOT just nationally which is obviously much easier) at a top top school like sidwell or NCS vs a more average DC private like Bullis, St Andrew’s, Maret, etc?

For context: middle school child scored 99th nationally and 99th independent school in several areas including math and I’m annoyed our private school isn’t challenging this kid but I’m wondering if there ought to be 10+ kids per grade like that in this area, or if there truly is 1-3 kids per 100 per grade testing that high. [/quote]

My kid scored 99th percentile for IN.  My guess is about a third of her grade did the same.  She's at a top private in a different large city.[/quote]

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