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Naf87 Naf87
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6 years ago
The initial sampling of groups of elements (clusters), followed by the selection of elements within each of the selected clusters, is called:
 
  a. cluster sample selection
  b. bifocal cluster sampling
  c. multistage cluster sampling
  d. cluster-biased sampling
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uniquwepuniquwep
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6 years ago
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Naf87 Author
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6 years ago
I appreciate what you did here, answered it right Smiling Face with Open Mouth
kh540941
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Yesterday
Smart ... Thanks!
54321abs
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2 hours ago
This helped my grade so much Perfect
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