Public Education Template (for when the 90th percentile ...

To find the 90th percentile lead value, arrange your samples from the lowest lead level to the highest lead level in a list. Number your samples from the lowest lead/copper value to the highest lead/copper value. Multiply the number of samples by 0.9. If you have ten samples, then 10 X 0.9 is 9. Find sample number 9. This sample is the 90th ... ................
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