inteli (version 0.1.1)

varE: varE: Calculate Variance Estimate

Description

This function computes the interval estimation for a single group variance by both LI and CI method.

Usage

varE(data, conf.level = 0.95, df = 1.2, lower = 1e-08, upper = 1e+06, k)

Value

Point Estimate (PE), lower limit/bound (LL/LB), upper limit/bound (UL/UB), width, sample size, cutoff value k and maximum log-likelihood function value are calculated.

Arguments

data

A numeric vector functioning as a sample data.

conf.level

A confidence level for the CI method, also applied to the LI method.

df

A degree of freedom for the LI method in terms of the denominator degree of freedom of the F-test, or (n-df) of LRT, where n is the sample size of the input data. A default value of 1.2 is suggested for a single-group variance interval estimation.

lower

A lower bound of 'uniroot' for the lower limit (LL) calculation. 1e-08 is a default.

upper

An upper bound of 'uniroot' for the upper limit (UL) calculation. 1e+06 is a default.

k

A cutoff value for the LI method. Unless specified, the F-test is used.

Examples

x <- rnorm(20, 0, 1)
varE(x)

y <- rnorm(40, 0, 1)
varE(y)