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BalancedSampling (version 1.4)
vsb: Variance estimator for spatially balanced sample
Description
Variance estimator of HT estimator of population total of target variable y
Usage
vsb(probs,ys,xs)
Arguments
probs
vector of length n (sample) with inclusion probabilities
ys
vector of target variable y of length n (sample)
xs
matrix of (standardized) auxiliary variables of n rows (sample) and q columns
Value
Number, the estimated variance
References
Grafström, A., and Schelin, L. (2014). How to select representative samples. Scandinavian Journal of Statistics.