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Jun 26, 2014 10:58 AM
(2814 views)

In JMP 10 power analysis, the SNR is specified by the user. Is the unknown sigma in that SNR my pilot study's standard dev divided by sqrt of my design size, or is it just the pilot study standard dev?

Dave Wakefield

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Jul 1, 2014 12:11 AM
(4822 views)

Hi Dave,

it's all about the anticipated RMSE of your model. So if you have a pilot study you would fit an adequate regression model and take that RMSE as an estimator. Another solution would be to use the standard deviation of some replicates in your data.

Bradley Jones wrote a pice on the different components of power analysis in JMP10 (compared to JMP 9): Power Analysis in Custom Design for a designed experiment in JMP 10

Hope this helps.

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Jul 1, 2014 12:11 AM
(4823 views)

Hi Dave,

it's all about the anticipated RMSE of your model. So if you have a pilot study you would fit an adequate regression model and take that RMSE as an estimator. Another solution would be to use the standard deviation of some replicates in your data.

Bradley Jones wrote a pice on the different components of power analysis in JMP10 (compared to JMP 9): Power Analysis in Custom Design for a designed experiment in JMP 10

Hope this helps.

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Jul 3, 2014 3:02 PM
(2655 views)

Thanks Statcon. I was thinking I had to figure out what JMP was doing with the non-centrality parameter to back out effect size.

Respectfully,

Dave