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Biometrics, 1976
In sampling certain types of materials, such as bags of fertilizer, or subsampling large quantities of water, as might be done in investigating the density of plankton in certain environmental situations, it is customary to composite the samples. That is, several samples are drawn, mixed into a composite sample, and a sample taken from the composite is
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In sampling certain types of materials, such as bags of fertilizer, or subsampling large quantities of water, as might be done in investigating the density of plankton in certain environmental situations, it is customary to composite the samples. That is, several samples are drawn, mixed into a composite sample, and a sample taken from the composite is
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Samples, Sampling and Sample Collection
1994In disease investigation, the term sample is used in two different ways; as a synonym for specimen, as in blood sample, and in the statistical sense of a sub-collection or sub-set of units drawn from the population. Collection and analysis of samples is the basis of investigation, and the validity of the results and conclusions of any study is totally ...
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Journal of Forensic Sciences, 1999
Abstract It is thought that, in a consignment of discrete units, a certain propotion of the units contain illegal material. A sample of the consignment is to be inspected. Various methods for the determination of the sample size are compared.
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Abstract It is thought that, in a consignment of discrete units, a certain propotion of the units contain illegal material. A sample of the consignment is to be inspected. Various methods for the determination of the sample size are compared.
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Sampling the Difficult-to-Sample
The Journal of Nutrition, 1991Difficult-to-sample populations are defined as rare populations or populations that are difficult to locate, enumerate or interview. This definition includes subgroups of the United States population that are at increased risk of adverse health effects associated with malnutrition.
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Sampling, Sample Moments and Sampling Distributions
2012Prior to this point, our study of probability theory and its implications has essentially addressed questions of deduction, being of the type: “Given a probability space, what can we deduce about the characteristics of outcomes of an experiment?” Beginning with this chapter, we turn this question around, and focus our attention on statistical inference
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Ranked Set Sampling with Unequal Samples
Biometrics, 2001A ranked set sampling procedure with unequal samples (RSSU) is proposed and used to estimate the population mean. This estimator is then compared with the estimators based on the ranked set sampling (RSS) and median ranked set sampling (MRSS) procedures.
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Sampling theory and sampling uncertainty
Analytical Methods, 2015We make a chemical measurement mostly to help make a rational decision about a 'target', a particular mass of material that is of interest in manufacturing, commerce, human health, or for cultural purposes. A target might comprise for example a shipment of a raw material, a batch of a manufactured product, the topsoil in a brown-field site, or a ...
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Sampling, Sample Moments, Sampling Distributions, and Simulation
1996Beginning with this chapter, we turn our attention toward concepts and procedures that are explicitly related to the problem of statistical inference. Prior to this point, our study of probability theory and its implications has essentially addressed questions of deduction: “Given a probability space, what can we deduce about the characteristics of ...
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