Computes the Standard Error of the weighted sample mean.
Arguments
- x
vector of measurements
- weights
vector of weights
- var.est
a character string, the estimator for the variance of the weighted mean
- ...
further arguments to
var.est
Details
The standard error of the sample mean is its standard deviation, i.e. the square root of the variance of the estimate
$$SEM = \hat{\sigma}_{W}$$
Be aware that while stratification during sampling is not affecting the estimate of the mean, it may affect its standard error.
Different options for the calculation of the variance are here provided.
See also
uevarwm for more information on the default estimate
of the variance.