ci_sd: CI for the Population Std

In confintr: Confidence Intervals

CI for the Population Std

Description

This function calculates CIs for the population standard deviation. They are derived from CIs for the variance by taking the square-root, see ci_var().

Usage

ci_sd(
  x,
  probs = c(0.025, 0.975),
  type = c("chi-squared", "bootstrap"),
  boot_type = c("bca", "perc", "stud", "norm", "basic"),
  R = 9999L,
  seed = NULL,
  ...
)

Arguments

x	A numeric vector.
probs	Lower and upper probabilities, by default c(0.025, 0.975).
type	Type of CI. One of "chi-squared" (default) or "bootstrap".
boot_type	Type of bootstrap CI. Only used for type = "bootstrap".
R	The number of bootstrap resamples. Only used for type = "bootstrap".
seed	An integer random seed. Only used for type = "bootstrap".
...	Further arguments passed to boot::boot().

Value

An object of class "cint", see ci_mean() for details.

See Also

ci_var()

Examples

x <- 1:100
ci_sd(x)
ci_sd(x, type = "bootstrap", R = 999)  # Use larger R

confintr documentation built on June 7, 2023, 6:24 p.m.