Survey Methodology
Statistical inference based on judgment post-stratified samples in finite population

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by Omer OzturkNote 1

  • Release date: December 20, 2016


This paper draws statistical inference for finite population mean based on judgment post stratified (JPS) samples. The JPS sample first selects a simple random sample and then stratifies the selected units into H judgment classes based on their relative positions (ranks) in a small set of size H. This leads to a sample with random sample sizes in judgment classes. Ranking process can be performed either using auxiliary variables or visual inspection to identify the ranks of the measured observations. The paper develops unbiased estimator and constructs confidence interval for population mean. Since judgment ranks are random variables, by conditioning on the measured observations we construct Rao-Blackwellized estimators for the population mean. The paper shows that Rao-Blackwellized estimators perform better than usual JPS estimators. The proposed estimators are applied to 2012 United States Department of Agriculture Census Data.

Key Words: Post stratified sample; Finite sample correction; Ranked set sample; Stratified sample; Rao-Blackwellized estimator.

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How to cite

Ozturk, O. (2016). Statistical inference based on judgment post-stratified samples in finite population. Survey Methodology, Statistics Canada, Catalogue No. 12-001-X, Vol. 42, No. 2. Paper available at


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