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The sampling in the survey adopted a stratified, multistage, probability proportionate to size approach.
Using a stratified, multistage, probability proportionate to size sampling approach, the survey obtained a sample of 17.05 million individuals, amounting to 1.31% of the population in China.
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Households and number of respondents (male and female) from each village were selected using probability proportionate sampling to maintain proportionality.
Clusters of 40 people who were 50 years and above were selected with probability proportionate to size using a multistage cluster random sampling method.
Data were weighted for the complex, multistage, probability sampling design.
A multistage probability survey was carried out among 12 17 year olds from Mexico City.
The international sampling of TEDS-M followed a stratified multistage probability sampling design.
After studying the variety (type and age) of the conserved objects, we selected a probability proportionate to size sampling method.
Villages were then selected using probability proportionate to size.
Clusters were selected with probability proportionate to size.
The BRFSS survey has a multistage probability sample design.
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