find.calibrated.beta {ssanv}

Find calibrated beta

Description

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.

Usage

find.calibrated.beta(beta, df, alpha = 0.05)

Arguments

beta

1-nominal.power

df

degrees of freedom

alpha

one-sided significance level of test

Details

See ss.fromdata.nvar.

Value

Calibrated beta value = 1 - calibrated power.

Author(s)

Michael P. Fay

References

Fay, M.P., Halloran, M.E., and Follmann, D.A. (2007). 'Accounting for Variability in Sample Size Estimation with Applications to Nonadherence and Estimation of Variance and Effect Size' Biometrics 63: 465-474.

See Also

ss.fromdata.nvar

Examples

## see Table 2 of Fay et al 2006.
1-find.calibrated.beta(.2,12,.025)