9_cluster_sampling

9_cluster_sampling - Cluster Sampling Lecture 9 STAT 651:...

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Unformatted text preview: Cluster Sampling Lecture 9 STAT 651: Survey Sampling Methods, Kaizar – p.1/23 Lecture 9: Cluster Sampling Reading: Lohr Chapter 5, sections 1 - 5 Introduction with examples Sample size estimation Notation Single-stage estimation Two-stage estimation STAT 651: Survey Sampling Methods, Kaizar – p.2/23 Introduction with examples Classic set-up: You would like to evaluate the students in a large school district. 1. Use the enrollment list, take an SRS 2. Divide the enrollment list by school, take a stratified random sample 3. Divide the enrollment list by school. (a) select only some schools (b) select only some classrooms (c) select only some students STAT 651: Survey Sampling Methods, Kaizar – p.3/23 Cluster Sampling: The big idea STAT 651: Survey Sampling Methods, Kaizar – p.4/23 Concrete Example: One stage clustering 1. Divide blocks into groups (clusters) 2. Sample n clusters 3. Measure the perimeter for all the units in the cluster. t i is the total perimeter in cluster i . ˆ t = N 1 n summationdisplay i ∈S t i STAT 651: Survey Sampling Methods, Kaizar – p.5/23 Concrete Example: Two stage clustering 1. Divide Blokus blocks into clusters (primary sampling units) 2. Sample n psus2....
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This note was uploaded on 07/26/2011 for the course STA 651 taught by Professor Kaizar during the Winter '11 term at Ohio State.

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9_cluster_sampling - Cluster Sampling Lecture 9 STAT 651:...

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