LIvar: Likelihood Interval of the ratio of two variances from two...

In LBI: Likelihood Based Inference

Likelihood Interval of the ratio of two variances from two groups

Description

Likelihood interval of the ratio of two variances from two groups assuming normal distribution. Likelihood interval usually gives a narrower interval when the likelihood function is asymmetric.

Usage

  LIvar(x, y, k, conf.level=0.95)

Arguments

x	observations from the first group, used for the numerator
y	observations from the second group, used for the denominator
k	1/k likelihood interval will be provided
conf.level	approximate confidence level

Details

It calculates likelihood interval of the ratio of two variances from two groups. Likelihood interval usually gives a narrower interval when the likelihood function is asymmetric.

Value

v1	variance of the first group
v2	variance of the second group
PE	point estimation for the proportion
LL	lower limit of likelihood interval
UL	upper limit of likelihood interval
logk	log(k) value
maxLL	maximum log likelihood

Author(s)

Kyun-Seop Bae [e-mail]

Examples

  LIvar(mtcars$drat, mtcars$wt)
  var.test(mtcars$drat, mtcars$wt)
  LIvar(mtcars$qsec, mtcars$wt)
  var.test(mtcars$qsec, mtcars$wt)

LBI documentation built on Oct. 17, 2024, 9:06 a.m.