Obtains the power given sample size for exact unconditional test of risk difference.
powerRiskDiffExact(
n = NA_integer_,
riskDiffH0 = 0,
pi1 = NA_real_,
pi2 = NA_real_,
allocationRatioPlanned = 1,
alpha = 0.025,
calculateAttainedAlpha = 1L
)A data frame with the following variables:
alpha: The specified one-sided significance level.
attainedAlpha: The attained one-sided significance level if
requested.
power: The power.
n: The sample size.
riskDiffH0: The risk difference under the null hypothesis.
pi1: The assumed probability for the active treatment group.
pi2: The assumed probability for the control group.
allocationRatioPlanned: Allocation ratio for the active
treatment versus control.
zstatRiskDiffBound: The critical value on the scale of
score test statistic for risk difference.
pi2star: The response probability in the control group
at which the critical value of the test statistic is attained.
The total sample size.
The risk difference under the null hypothesis. Defaults to 0.
The assumed probability for the active treatment group.
The assumed probability for the control group.
Allocation ratio for the active treatment versus control. Defaults to 1 for equal randomization.
The one-sided significance level. Defaults to 0.025.
Whether to calculate the attained alpha.
Kaifeng Lu, kaifenglu@gmail.com
powerRiskDiffExact(n = 68, pi1 = 0.6, pi2 = 0.25, alpha = 0.05)
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