Data was gathered from a random sample of approximately 7,500 U.S. producers of varying sizes, though large operations were sampled more heavily.
A randomly selected sample of approximately 50 cows in each herd were scored for body condition, lameness, cleanliness, rising behavior, and lesions at the hocks.
A sample of approximately 800 residents was chosen and a face to face interview was conducted using a hypothetical open ended question designed to elicit the respondents WTP.
Using a sample of approximately 150,000 employee reviews, we extract both employees' explicit assessments of outlook and a measure of their latent outlook derived from factor analysis.
Here we conducted a large-scale genetic association analysis of educational attainment in a sample of approximately 1.1 million individuals and identify 1,271 independent genome-wide-significant SNPs.
Consistent with our previous research, we found that spending more on others was associated with greater happiness among this sample of approximately 1,000 New York Times readers, even though the respondents had been exposed to our previous findings.
We obtained a sample of approximately 7,300 households.
We felt we needed a sample of approximately 20,000 names.
The 2012 National Congregations Study (NCS) is a major survey of a nationally representative sample of approximately 1,300 congregations from all over the United States.
The gardenhose provides a sample of approximately 10% of the entire Twitter corpus in a machine-readable format.
In each year between 1999 and 2006, Statistics Canada surveyed a representative sample of approximately 6000 workplaces.
