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Operating Characteristics
Same general operating characteristics of interest
no matter the type of stopping rule
–Frequentist
power curve
•Type
I error (null) and power (design alternative)
–Sample
size requirements
•Maximum,
average, median, other quantiles
•Stopping
probabilities
–Inference
at each boundary
•Frequentist
point estimate, confidence interval, P value
–Futility
measures
•Conditional
power, predictive power