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Worst‐Case Scenario Power for the Best Binomial Group

Source: R/ss_best_binomial.R
wcs_power_best_binomial.Rd

Searches for the probability in the best‐performing group that yields the lowest statistical power, given an indifference zone specification, a number of groups, and a number of subjects per group.

Usage

wcs_power_best_binomial(dif, ngroups, npergroup)

Arguments

dif

Numeric. Indifference zone specification (difference threshold).

ngroups

Integer. Number of groups to compare.

npergroup

Integer. Number of subjects per group.

Value

A named list with components:

p1

Numeric. Probability in the best group that yields the minimum power.

minimum_power

Numeric. The minimum power achieved at p1.

Details

Defines an internal function fx that wraps power_best_binomial with the supplied parameters, then uses optimize over the interval [0,1] to find the probability p1 that minimizes the resulting power.

See also

power_best_binomial, optimize

Examples

wcs_power_best_binomial(dif = 0.1, ngroups = 3, npergroup = 50)
#> $p1
#> [1] 0.5541703
#> 
#> $minimum_power
#> [1] 0.7410576
#>