Representative sample


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Representative sample

A random sample of people that adequately represents the test-taking population in age, gender, race, and socioeconomic standing.
References in periodicals archive ?
What's more, after five shots, like other scientists had noticed, the spectrum from the vaporized rock stabilized into a representative sample of the rock type below.
From the Gas Processors Association publication GPA 2166-05, "The objective of the listed sampling procedures is to obtain a representative sample of the gas phase portion of the flowing stream under investigation.
From this sample, we identified a representative sample (n = 284) of students and two other samples: students with low initial achievement (n = 202), and students with average/high initial achievement (n = 213); the low study-entry (LSE) and not-low study-entry (not-LSE) subsamples, respectively.
Also, in contrast to a traditional test sieving process that "measures" particles by calculating the percentage of a selected standard size of a representative sample, this analyzer accurately counts and measures each individual particle of a representative material sample in real time.
Van Voorhees of the University of Chicago and his colleagues analyzed data from a survey conducted in the mid 1990s of a national representative sample of 6,504 adolescents in grades 7-12.
The data are based on SAMHSAs 2007 National Survey on Drug Use and Health, which includes a representative sample of 22,000 adolescents.
The survey, given to a representative sample of 1,007 people age 18 and over with Internet access, also found that half of coffee drinkers would rather give up their cell phone for a week than coffee.
Their analysis is the first to document in a nationally representative sample the extent of pelvic floor disorders, a cluster of health problems that causes physical discomfort and limits activity.
Taken as a representative sample for the whole of the country, this means eight million young people are not getting enough exercise, said KidsOutdoors, a campaign led by the Scout Association.
Violent Felons in Large Urban Counties presents data collected from a representative sample of felony cases that resulted in a felony conviction for a violent offense in 40 of the 75 largest counties in the United States.
The aim of this anthology is to provide "a representative sample of the Arabic-Islamic philosophical tradition in a manner that is accessible to beginning students of philosophy, as well as to more seasoned philosophers with little or no exposure to this tradition" (xii).
From a representative sample of Wichita, Kan., residents, the researchers identified 43 individuals with CFS and 60 others with no fatigue problems.

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