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Why does Crystal reports give a different answer for Percentiles (using PthPercentile function) than Excel?

Last Modified: 2010-04-26
Hi - Getting confused by this. Grateful for any help.

I have a simple report in Crystal Reports where I calculate the 75th-Percentile of a small dataset using the PthPercentile function. However, if I put the same data in to Excel and use the QUARTILE function, I get a different answer for the 75th percentile? I have read in a number of places that there is actually no standard way of calculating the median and percentiles. In fact, Excel and Crystal seem to do it differently. Can anyone tell me exactly how Crystal is deriving and interpolating the percentile? It might give me a clue as to how to explain the results. Cheers.
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Professor Emeritus of MIS at Penn State Erie and Owner, Millet Software
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Thank you! Right on the money.

the link no longer available.. can any one help me on this? I also facing the exact problem

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