stdDeviations {GroupSeq} | R Documentation |
Standard deviations are calculated.
stdDeviations(n, t2)
n |
is the number of interim analyses. |
t2 |
is the 'second' time scale, used for the covariance of sequential statistics, usually number of events or subjects. |
standardDeviation |
is the standard deviation of the process increment. |
standardDeviationProcess |
is the standard deviation of the process. |
This function is meant to be called in context of using groupseq
Roman Pahl
## simple example stdDeviations(3, c(0.33,0.66,1.0)) ## with following result: # $standardDeviation # [1] 0.5744563 0.5744563 0.5830952 # # $stdvOfTheProcess # [1] 0.5744563 0.8124038 1.0000000