sample_size_norm_local {adpss} | R Documentation |
sample_size_norm_local
calculates the power if the time of the final
analysis is given and otherwise the sample size.
The computed power for effect_size
is an approximate lower bound.
Sample size is also calculated on the basis of the bound.
sample_size_norm_local(overall_sig_level = 0.025, min_effect_size = 1, sample_size = TRUE, effect_size = 1, time = 0, target_power = 0.8, final_time = 0, tol_sample_size = 1e-08, input_check = TRUE)
overall_sig_level |
Overall significance level in (0, 1). Default is 0.025. |
min_effect_size |
The minimum effect size. It should be positive. The working test will be constructed to have the power of |
sample_size |
If |
effect_size |
The effect size, on the basis of which the power or sample size calculation will be performed. In locally efficient adaptive designs, any real value no less than |
time |
The time of the current analysis. |
target_power |
The power, on the basis of which the sample size calculation will be performed. |
final_time |
The time of the final analysis. |
tol_sample_size |
The precision in calculation of the sample size. |
input_check |
Indicate whether or not the arguments input by user contain invalid values. |
It returns the sample size (when sample_size = TRUE
) or the power (when sample_size = FALSE
).
adaptive_analysis_norm_local
for example of this function.