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Nov 9, 2017 5:46 AM
(555 views)

I have a question regarding design evaluation in JMP: when I'm running power analysis for main effects only, the power is higher for these effects then if I would do analysis with 2nd degree interactions. Do you know why the addition of interactions in the analysis will change the power of the main effects?

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Nov 9, 2017 1:49 PM
(666 views)

Estimating the additional terms is consuming additional degrees of freedom, which will influence the power of estimation

-Dave

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Nov 9, 2017 1:49 PM
(667 views)

Estimating the additional terms is consuming additional degrees of freedom, which will influence the power of estimation

-Dave

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Nov 10, 2017 9:58 AM
(501 views)

Thanks David. It was helpful.