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- How do I bin/normalize data to minimize intra/inter subgroup variance?

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Feb 10, 2015 9:50 AM
(3104 views)

I have output test data with high variance to mean ratio. This data is correlated to several categorical variables. I would like to normalize the output data into small number of subgroups to minimize the variance to mean ratios. I know I can pick the subgroups and JMP will calculate intra-subgroup and inter-subgroup variance. If I pick good subgroup factors to normalize, then most of the variance is inter-group and much less intra-group. Is there a process that will explore a large number of factors and show intra to inter variance, so I can select an optimum subgroup? Thanks.

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Feb 11, 2015 3:04 PM
(5083 views)
| Posted in reply to message from paul_h_anderson 02/10/2015 12:50 PM

Hi, Cousin Paul!

I hate to start a message apologizing for it's possible ignorance, but without more context, it's kind of a shot in the dark...

Have you explored the Partition platform? It's binary recursive partitioning analyses will certainly "bin" your large-number-of-factors data for you in a manner that minimize the intragroup heterogeneity and maximizes intergroup heterogeneity between the two (and only two!) groups at each split.

This may not be exactly what you want, but it is certainly easily done!

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Feb 11, 2015 3:04 PM
(5084 views)
| Posted in reply to message from paul_h_anderson 02/10/2015 12:50 PM

Hi, Cousin Paul!

I hate to start a message apologizing for it's possible ignorance, but without more context, it's kind of a shot in the dark...

Have you explored the Partition platform? It's binary recursive partitioning analyses will certainly "bin" your large-number-of-factors data for you in a manner that minimize the intragroup heterogeneity and maximizes intergroup heterogeneity between the two (and only two!) groups at each split.

This may not be exactly what you want, but it is certainly easily done!