2015-7-3 xlpeng 1 Cluster Sampling (Chapter 6, Textbook, Barnett, V., 1991)
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22/3/16 www.uic.edu.hk/~xlpeng 1 Cluster Sampling (Chapter 6, Textbook, Barnett, V., 1991)
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Transcript of 2015-7-3 xlpeng 1 Cluster Sampling (Chapter 6, Textbook, Barnett, V., 1991)
23/4/19 www.uic.edu.hk/~xlpeng 11
Cluster means
Within-cluster variance
Cluster means
Within-cluster variance
Systematic Sampling
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Systematic sample can be viewed as a cluster sample of size m=1!
Systematic sample mean
Systematic Sampling
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Comparison of s.r. sampling with systimatic sampling
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Consider
This estimator is unbiased and has variance
This estimator of population total is