Normality and lognormality tests (UNE-EN 689)

Applies the Shapiro-Wilk test to the ED values (to test normality) and to their logarithm (to test lognormality).

Usage

une689_normality_test(ed)

Arguments

ed

Numeric vector. Daily exposure (ED) values, all strictly positive. At least 3 values are required (minimum required by stats::shapiro.test()); UNE-EN 689 additionally requires a minimum of 6 for the full statistical assessment.

Value

A list with elements W_normal, pval_normal, W_lognormal, pval_lognormal.

Examples

une689_normality_test(c(5, 6, 7, 8, 9, 10))
#> $W_normal
#> [1] 0.9818894
#> 
#> $pval_normal
#> [1] 0.960555
#> 
#> $W_lognormal
#> [1] 0.9751017
#> 
#> $pval_lognormal
#> [1] 0.9247816
#>