This nonparametric method is used to calculate the reference interval when the distribution is skewed and the sample size is above to 120 observations.

## Usage

`nonparRI(x, ind = 1:length(x), conf.level = 0.95)`

## Arguments

- x
(

`numeric`

)

numeric measurements from target population.- ind
(

`integer`

)

integer vector for boot process, default is all elements in`x`

.- conf.level
(

`numeric`

)

the percentile of reference limit.

## Examples

```
data("calcium")
x <- calcium$Value
nonparRI(x)
#> 2.5% 97.5%
#> 9.1 10.3
```