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1986
A sample divider is used not only in stratified sampling but also in stage sampling for obtaining a laboratory or analytical sample. Here the unit to be investigated is either repeatedly divided into two parts, as in a riffler, until the sample size has been reached (Figure 8.1.1), or metered directly into the corresponding portion size on a rotary ...
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A sample divider is used not only in stratified sampling but also in stage sampling for obtaining a laboratory or analytical sample. Here the unit to be investigated is either repeatedly divided into two parts, as in a riffler, until the sample size has been reached (Figure 8.1.1), or metered directly into the corresponding portion size on a rotary ...
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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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Sample Size in Qualitative Interview Studies
Qualitative Health Research, 2016K. Malterud, V. Siersma, A. D. Guassora
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Sampling and sample preparation
1998It is essential that the material actually analysed either be representative of the material available, or be that most appropriate for solving the particular problem presented.
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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 [PDF]
, 1996 Beginning 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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Sampling and Sample Preparation
1997Daftar isi: 1. sampling:an introduction, human specimens, wet precipitation: rain and snow, 2. sampling of sea-and fresh water for the analysis af trace elements, 3. soils and solutions, waste, 4. collection, preparational and long-trem storage of marine samoles 5. biological sample 6. sampling of industrial material, 7.
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Unit root tests in panel data: asymptotic and finite-sample properties
, 2002Andrew T. Levin, C. Lin, C. Chu
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