`n_icc(beta = 0.8, alpha = 0.05, k = 3, icc, icc_lower)`

## Arguments

- beta
power level, default `beta = 0.8`

, also called assurance
probability.

- alpha
confidence level, default `alpha = 0.05`

- k
number of raters, default `k = 3`

- icc
reliability coefficient

- icc_lower
lower limit of the reliability coefficient icc

## Details

Calculate the sample size for achieving a certain lower limit of the
confidence interval derived by the F procedure. This method is developed for
the ICC type oneway.

## References

Zou, G.Y. (2012) Sample size formulas for estimating intraclass correlation
coefficients with precision and assurance. Statistics in medicine, 31, 3971-3981.

## Examples

```
n_icc(icc = 0.7, icc_lower = 0.6, k = 4)
#> [1] 109.6927
n_icc(icc = 0.7, icc_lower = 0.6, k = 2)
#> [1] 204.8471
n_icc(icc = 0.7, icc_lower = 0.6, k = 3)
#> [1] 133.1105
```