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Cluster Sampling(Chapter 6, Textbook, Barnett, V., 1991)
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Comparison of s.r. sampling with cluster sampling
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Comparison of s.r. sampling with cluster sampling
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Comparison of s.r. sampling with cluster sampling
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Comparison of s.r. sampling with cluster sampling
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Cluster means
Within-cluster variance
Cluster means
Within-cluster variance
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Example 6.1
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Example 6.1
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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Two ways of estimating ---
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Y
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n
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Consider
This estimator is unbiased and has variance
This estimator of population total is
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(PPS estimation)