var.linear
Linear Variance Estimate
Description
Estimates the variance of a statistic from its empirical influence values.
Usage
var.linear(L, strata = NULL)
Arguments
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 empirical influence values) come from which strata. |
Value
The variance estimate calculated from L
.
References
Davison, A. C. and Hinkley, D. V. (1997) Bootstrap Methods and Their Application. Cambridge University Press.
See Also
empinf
, linear.approx
, k3.linear
Examples
# To estimate the variance of the ratio of means for the city data. ratio <- function(d,w) sum(d$x * w)/sum(d$u * w) var.linear(empinf(data = city, statistic = ratio))
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Licensed under the GNU General Public License.