# k3.linear: Linear Skewness Estimate

## Description

Estimates the skewness of a statistic from its empirical influence values.

## Usage

k3.linear(L, strata = NULL)

## Arguments

L

Vector of the empirical influence values of a statistic. These will usually
be calculated by a call to `empinf`

.

strata

A numeric vector or factor specifying which observations (and hence which
components of `L`

) come from which strata.

## Value

The skewness estimate calculated from `L`

.

## References

Davison, A. C. and Hinkley, D. V. (1997)
*Bootstrap Methods and Their Application*. Cambridge University Press.

## Examples

# NOT RUN {
# To estimate the skewness of the ratio of means for the city data.
ratio <- function(d, w) sum(d$x * w)/sum(d$u * w)
k3.linear(empinf(data = city, statistic = ratio))
# }