Represents the expected power of the individual randomization sequences.
setPower(d, method, alpha = 0.05)effect size.
character string, should be one of "sim" or "exact", see Description.
significance level.
S4 object of class power, a formal representation of the
issue of power in a clinical trial.
The attained power of an individual randomization sequence can be an issue
in the design of a clinical trial. The power of a randomization sequence is
is computed dependent on the effect size d and the difference in
group sizes in the end if.
If method="sim", the object represents the simulated power of an
individual randomization sequence. When calling assess for a
power object with method="sim", one test decision is computed
for each randomization sequence of randSeq. The power is the
proportion of falsely (correctly) rejected null hypotheses.
If method="exact", the object represents the exact power of an
individual randomization sequence. When calling assess for a
power object with method="exact", the exact p-value
of each randomization sequence is computed. So far, this is only supported
for normal endpoints. Then the power is the sum of the corresponding
quantiles of the noncentral t-distribution.
Other issues: chronBias,
combineBias, corGuess,
imbal, issue,
selBias