This dissertation is concerned with stratified inverse sampling and four different sampling schemes are considered, namely inverse random sampling with replacement, inverse random sampling without replacement, inverse PPS sampling with replacement and inverse PPS sampling without replacement. Unbiased estimators of the mean of a study variable in the whole population, the number of units in a class of interest and the prevalence of a characteristic are given together with their unbiased variance estimators. Estimation of the mean per unit in the ...