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  • Due to the recently reported Microsoft outage, users may be temporarily unable to access My JMP or experience a delay receiving their verification codes. If you have previously installed JMP on your computer, this outage should not impact your ability to access the software. My JMP services will be restored as soon as Microsoft resolves this issue.
  • Image to Table JMP extension imports single or batch images as data tables. Useful to extract curves from pictures or convert image data to curve data to use in analyses like Functional Data Explorer. Download and install the extension.

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deer_dog
deer_dog
Level II

oh my - so many different methods to calculate percentiles

Nov 29, 2011 11:55 AM (4620 views)

http://www.amstat.org/publications/jse/v14n3/langford.html

Gosh - I did not realize there were so many different ways to calculate percentiles! I just noticed my results from Excel (formula =percentile (array, percentile) and JMP (quantile plots and data) differed, and that led me to the above website, which identifies about 12 or more different methods! I am at a bit of a loss, for I often use results from both programs (obviously that has to change). Or I calculate percentiles in Excel when summarizing data and run stats in JMP later - which means two different methods were used.

The above publication recommends one alternative that is given in SAS, which I believe is a bit different than the JMP method.

I suppose the best solution would be if there was a way to make the same calculation in JMP and excel, since those are the programs I mostly use. Is there?

Thanks in advance.

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