powered by
Estimates the skewness of a statistic from its empirical influence values.
k3.linear(L, strata = NULL)
The skewness estimate calculated from L.
L
Vector of the empirical influence values of a statistic. These will usually be calculated by a call to empinf.
empinf
A numeric vector or factor specifying which observations (and hence which components of L) come from which strata.
Davison, A. C. and Hinkley, D. V. (1997) Bootstrap Methods and Their Application. Cambridge University Press.
empinf, linear.approx, var.linear
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))
Run the code above in your browser using DataLab