Design effect DEFF from the two variances

Formula: DEFF = Var_design / Var_SRS

Usage

Deftef(design_var, srs_var)

Arguments

design_var

Variance under the realised complex design.

srs_var

Variance under simple random sampling of the same size.

Value

List with estimate (DEFF), deff, deft, n, method.

Details

DEFT = sqrt(DEFF) is the standard-error inflation factor, and n_eff = n / DEFF the effective sample size. Both arguments may be vectors, in which case the ratio is taken element by element.

References

Kish (1965), Survey Sampling, Wiley, section 8.2.

Examples

V <- c(1, 2, 3, 4, 5, 6, 7, 8)
Deftef(V, V)
#> $estimate
#> [1] 1
#> 
#> $deff
#> [1] 1 1 1 1 1 1 1 1
#> 
#> $deft
#> [1] 1 1 1 1 1 1 1 1
#> 
#> $n
#> [1] 8
#> 
#> $method
#> [1] "Kish design effect DEFF = Var_design / Var_SRS"
#> 
#> attr(,"class")
#> [1] "morie_rich_result" "list"