k3.linear | R Documentation |

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

```
k3.linear(L, strata = NULL)
```

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

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

The skewness estimate calculated from `L`

.

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

`empinf`

, `linear.approx`

, `var.linear`

```
# 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))
```

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