This function is vectorized.

`confIntSD(x, n = NULL, conf.level = 0.95)`

## Arguments

- x
Either a standard deviation, in which case `n`

must also be
provided, or a vector, in which case `n`

must be NULL.

- n
The sample size is `x`

is a standard deviation.

- conf.level
The confidence level

## Value

A vector or matrix.

## Examples

```
ufs::confIntSD(mtcars$mpg);
#> sd.ci.lo sd.ci.hi
#> 4.831825 8.012704
ufs::confIntSD(c(6, 7), c(32, 32));
#> sd.ci.lo sd.ci.hi
#> sd=6, n=32 4.810220 7.976877
#> sd=7, n=32 5.611924 9.306357
```