Allocates a sample of size n using Neyman optimal allocation in Stratified Simple Random Sampling.
n
optiallo(n, x, stratum = NULL, ...)
A list with two elements:
a vector indicating the stratum to which each element belongs.
a vector indicating the sample size of the strata to which each element belongs.
a positive integer indicating the desired sample size.
a positive numeric vector giving the values of the auxiliary variable.
a vector indicating the stratum to which every unit belongs (see ‘Details’).
other arguments passed to stratify (see ‘Details’).
stratify
If stratum==NULL, the stratification is generated via stratify. Then at least the number of strata should be passed to stratify using the argument H.
stratum==NULL
H
stratify for defining the stratification using the cum-sqrt-rule.
x<- 1 + sort( rgamma(100, shape=4/9, scale=108) ) st1<- stratify(x,H=6) optiallo(n=30,x,stratum=st1) optiallo(n=30,x,H=6)
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