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relationship between percentile and z-score

This question was posted the Assessment and Surveillance forum area and has 1 replies.

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Kiran Deshpande Shukla

Normal user

10 Jan 2012, 15:17

How is 3rrd percentile related to z-score??in other words ,is 3rd percentile equivalent of 70% w/h???

Mark Myatt

Frequent user

11 Jan 2012, 18:06

I assume this is about reference populations. The 3rd percentile is related to the z-score ... it is about -1.9 z. It is less strongly related to the % median since that does not account for variability. 70% median is well below the 1st percentile and below -3 z.

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