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how to find a bimodal distribution

  1. #1
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    02-03-2005
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    how to find a bimodal distribution

    If I have a list of values in an Excel spreadsheet (fewer than 100 values) that I think may include a bimodal distribution, how can I easily test this theory and find the center of the two modes using Excel? To be more specific, I have measured grain size in a polycrystalline material and found a large stdev but my intuition tells me the grains fall in two size categories. is there an easy way to identify these groups and their peak values in Excel?
    I am new to this forum. I'd appreciate any help.
    Thank you!

  2. #2
    Forum Expert swatsp0p's Avatar
    Join Date
    10-07-2004
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    Kentucky, USA
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    Excel 2010
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    did you sort your data ascending, apply Subtotal (Sum), reduce to only Subtotals (group 2) and graph it to see? This, to me, would be a quick validation of a theory.

    HTH
    Bruce
    The older I get, the better I used to be.
    USA

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