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- How can JMP calculate a weighted median?

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Aug 21, 2012 12:55 PM
(3300 views)

I have a survey data set with 35000 observations that includes a population weight to estimate the total U.S. I'm not a SAS expert and I need to calculate weighted median as well as weighted quantiles. I have the weight data tagged with the weight role, but that seems to only apply to weighted averages. Any suggestions? Thanks.

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Aug 22, 2012 1:19 AM
(5354 views)

Try the frequency role in the distribution platform. At least with integer weights JMP gives quantiles that appears to be adequately weighted, at least they seem to be intuitively right. Fraction weights works too, but I don't know how JMP uses them in the quantile calculations.

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Aug 22, 2012 1:19 AM
(5355 views)

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Aug 22, 2012 9:02 AM
(2812 views)

Thanks MS...this did exactly what I needed.