Calculates sample size or power for a multiple-sample proportion test.
Usage
k_prop_size(pA, pB, tau, alpha, beta = NULL, n = NULL)
Arguments
- pA
Numeric. True proportion of group A.
- pB
Numeric. True proportion of group B.
- tau
Integer. Number of comparisons.
- alpha
Numeric. Type I error rate.
- beta
Numeric (optional). Type II error rate. Required for sample size calculation.
- n
Integer (optional). Sample size. Required when calculating power.
Value
Returns sample size (if beta is given), or power (if n is given).
Note
Only one of beta (for sample size calculation) or n (for power calculation) should be specified.
Required arguments:
For sample size: pA, pB, tau, alpha, beta
For power: pA, pB, tau, alpha, n
Examples
# Sample size
k_prop_size(pA = 0.2, pB = 0.4, tau = 2,
alpha = 0.05, beta = 0.2)
#> [1] 96
# Power
k_prop_size(pA = 0.2, pB = 0.4, tau = 2,
alpha = 0.05, n = 96)
#> [1] 0.8042732