Cousineau-Laurencelle's lambda correction for cluster-randomized sampling

The functions CousineauLaurencelleLambda() returns the correction factor for cluster-randomized sampling. This correction is then used in a variety of ways, for example, to get the effective number of participants (in a power study) or to correct a t-test. See cl16superb.

CousineauLaurencelleLambda(paramvector)

Arguments

paramvector: A vector with, in that order, the intra-class correlation r, the number of clusters, then the number of participants in all the clusters.

Value

lambda the correction factor for cluster-randomized sampling.

References

Examples

# Example from Cousineau & Laurencelle, 2017, p. 124:
CousineauLaurencelleLambda( c(0.2, 5, 20, 20, 20, 20, 20) )
#> [1] 2.234188
# 2.234188