Chapter 17
Prospective Sample Size and Power
Use the DOE > Design Diagnostics > Sample Size and Power command to answer the question “How many runs do I need?” The important quantities are sample size, power, and the magnitude of the effect. These depend on the significance level, alpha, of the hypothesis test for the effect and the standard deviation of the noise in the response. You can supply either one or two of the three values. If you supply only one of these values, the result is a plot of the other two. If you supply two values, the third value is computed.
The Sample Size and Power platform can answer the question, “Will I detect the group differences I am looking for, given my proposed sample size, estimate of within-group variance, ...
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