Description Usage Arguments Value References Examples
The SSD.boundary()
is used to calculate the futility
and efficacy stopping boundaries, meanwhile protect the overall Type I
error rate at the pre-specified level.
1 | SSR.boundary(alpha, pstar)
|
alpha |
The overall Type I error rate |
pstar |
The |
A list contain
upper.boundary The efficacy stopping boundary at the interim analysis
lower.boundary The futility stopping boundary at the interim analysis
Proschan MA, Hunsberger SA. Designed extension of studies based on conditional power. Biometrics 1995:1315-24. <doi:10.2307/2533262>
1 2 3 | alpha <- 0.05
pstar <- 0.2
res <- SSR.boundary(alpha = alpha, pstar = pstar)
|
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