1. The sample frames at the right have very fine inking. 2. It results from gaps between the sampling frame and the total population. 3. Some researchers have used search engines to construct sampling frames . 4. It should be expected that sample frames , will always contain some mistakes. 5. Furthermore this could be achieved within a sample frame of only around 256 respondents. 6. These surveys were closely modeled after the HRS in sample frame , design and content. 7. The primary sampling frame is the Census Bureau s Master Address File ( MAF ). 8. The import merchandise sampling frames are obtained from the U . S . Customs Service. 9. The reference period for a sampling frame is generally the most recent available 12 months. 10. For example, the Department of Transportation provides the sampling frames for the air freight price indexes.
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