find.calibrated.beta {ssanv} | R Documentation |
Called by ss.fromdata.nvar
. Finds calibrated beta (1-power) for use when estimating
standard deviation from data in sample size calculations for differences in two normal means.
find.calibrated.beta(beta, df, alpha = 0.05)
beta |
1-nominal.power |
df |
degrees of freedom |
alpha |
one-sided significance level of test |
See ss.fromdata.nvar
.
Calibrated beta value = 1 - calibrated power.
Michael P. Fay
Fay, M.P., Halloran, M.E., and Follmann, D.A. (2006). `Accounting for Variability in Sample Size Estimation with Applications to Nonadherence and Estimation of Variance and Effect Size' (submitted to Biometrics).
## see Table 2 of Fay et al 2006. 1-find.calibrated.beta(.2,12,.025)