sample_size_norm_global {adpss}

Calculate sample size or power for a globally efficient adaptive design.

Description

sample_size_norm_global 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.

Usage

sample_size_norm_global(
  initial_test = 0,
  sample_size = TRUE,
  effect_size = 0,
  time = 0,
  target_power = 0.8,
  final_time = 0,
  tol_sample_size = 1e-05,
  input_check = TRUE
)

Arguments

initial_test

Designate the initial working test generated by work_test_norm_global function.

sample_size

If TRUE, the function will return the sample size required by the globally efficient adaptive design to have the power of target_power. If FALSE, the function will return the power when the final interim analysis and the final analysis are conducted at time and final_time, respectively.

effect_size

The effect size, on the basis of which the power or sample size calculation will be performed. In globally efficient designs, any real value is allowed.

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.

Value

It returns the sample size (when sample_size = TRUE) or the power (when sample_size = FALSE).

See Also

adaptive_analysis_norm_global for example of this function.