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Default Signal to Noise in Power Calculation in JMP DOE platform

For some reason (can't remember why - must be something I picked up a few years ago) I have always assumed in the default Power Calculation in the DOE platform (Power Analysis) with RMSE = 1 and Anticipated Coefficient 1 is calculated for a signal to noise ratio of 2 (ie the signal is defined as twice the size of the Anticipated Coefficient)

Something I have recently seen on a DOE JMP webinar suggests to me that this is wrong and that in fact the Signal = Anticipated coefficient (NOT twice the Anticipated Coefficient) , so the default power is in fact calculated for a signal to noise ratio of 1

Can someone put me straight on this

Many thanks

DOE

Re: Default Signal to Noise in Power Calculation in JMP DOE platform

You are correct. The Anticipated RMSE is 1 by default. The Anticipated Coefficient is also 1 by default. The coded factor levels mean that the total effect is the predicted change in the response when the factor changes from -1 to +1. So the predicted effect is twice the coded estimate of the coefficient.

Re: Default Signal to Noise in Power Calculation in JMP DOE platform

Mark - thanks for clarification. Good to know that what I've been teaching people for a few years is correct! I was getting worried

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