I have the mean and I have the value at a percentile (99th percentile to be specific). I am just wondering if it's possible to find the SD. Actually, what I am trying to find is the value at the 90th percentile (I think I need the SD to do it, but maybe just maybe there's another method...)(adsbygoogle = window.adsbygoogle || []).push({});

Just in case, the mean is 3.8 and the value at the 99th percentile is 4.64

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# Is it possible to find the SD without the data?

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