Looks up the one-sided tolerance factor (UT) tabulated by UNE-EN 689
for a number of days n between 6 and 30. For n > 30 the limit
value 1.820 is used, as established by the standard.
Arguments
- n
Integer. Number of days (ED measurements) used in the
statistical assessment. Must be >= 6.
Value
Numeric scalar with the UT value, or NA_real_ if n < 6.
Examples
une689_ut(6)
#> [1] 2.187
une689_ut(50)
#> [1] 1.82
