Function to calculate design effect (DEFF) given intracluster correlation coefficient (ICC) and cluster size.

Source: R/get_deff.R

Function to calculate design effect (DEFF) given intracluster correlation coefficient (ICC) and cluster size.

get_deff(x, cluster, size)

Arguments

x

variable to calculate ICC from
cluster

variable identifying the clusters or groupings of the variable
size

number of samples within a cluster

Value

A numeric value for design effect (DEFF)

Examples

  x <- sample(1:2, size = 25, replace = TRUE)
  cluster <- c(rep(1, 5), rep(2, 5), rep(3, 5), rep(4, 5), rep(5, 5))
  get_deff(x = x, cluster = cluster, size = 10)
#>            n     clusters          rho         deff 
#> 226.00000000  46.00000000   0.07352941   6.29411765