CES began moving toward implementing a

probability sample in the early 1990s.

It is randomness in the technical sense that provides assurance of unbiased estimates from a randomized controlled experiment or a

probability sample. Randomness in the technical sense also justifies calculations of standard errors, confidence intervals, and p-values.

No statistical results from that canvassing are reported here because it was an opt-in opportunity meant to draw out comments from patrons and librarians, and the findings are not part of a representative,

probability sample. Instead, the authors highlight librarians' written answers to open-ended questions that illustrate how they are thinking about and implementing new library services.

"Accuracy would appear to be most important in large-scale fact-finding studies that provide input for major policy decisions" because a "carefully controlled

probability sample is necessary to guarantee a high degree of precision.

This online survey is not based on a

probability sample and therefore, no estimate of theoretical sampling error can be calculated.

If a taxpayer employed a

probability sample or method not covered by this revenue procedure, then the estimate may be referred to a Statistical Sampling Coordinator for resolution or issue development.

The KnowledgePanel is a nationally representative

probability sample of the U.S.

The study looked at health care quality perceptions among foreign-born Hispanics and used national

probability sample data from telephone interviews.

This online survey is not based on a

probability sample and therefore no estimates or theoretical sampling error can be calculated.

Because sampling techniques are not based on a pure

probability sample, it is not possible for Harris to quantify' or estimate sampling error.

Hon Ho and associates from the department of psychiatry at the University of Colorado, Denver, examined data from the National Longitudinal Study of Adolescent Health, a national

probability sample of individuals who were surveyed several times over a 14-year period on social, economic, psychological, and medical topics.

He and his colleagues examined data from the National Longitudinal Study of Adolescent Health, a

probability sample of people surveyed several times over 14 years on social, economic, psychological, and medical topics.