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Strategies to Approximate Random Sampling and Assignment

Patrick Dattalo

Published in print:
2009
Published Online:
February 2010
ISBN:
9780195378351
eISBN:
9780199864645
Item type:
book
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780195378351.001.0001
Subject:
Social Work, Research and Evaluation

Random sampling (RS) and random assignment (RA) are considered by many researchers to be the definitive methodological procedures for maximizing external and internal validity. However, there is a ... More


Methodological Alternatives and Supplements to Random Sampling

Patrick Dattalo

in Strategies to Approximate Random Sampling and Assignment

Published in print:
2009
Published Online:
February 2010
ISBN:
9780195378351
eISBN:
9780199864645
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780195378351.003.0002
Subject:
Social Work, Research and Evaluation

This chapter begins with a discussion of external validity and sampling bias. Next, the rationale and limitations of RS as a way to maximize external validity and minimize sampling bias are ... More


The Sampling Programme and the Measurement and Description of Dispersion

Peter A. Henderson

in Southwood's Ecological Methods

Published in print:
2021
Published Online:
May 2021
ISBN:
9780198862277
eISBN:
9780191895067
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/oso/9780198862277.003.0002
Subject:
Biology, Biomathematics / Statistics and Data Analysis / Complexity Studies, Ecology

The steps required during the planning of a sampling campaign are described. The time of sampling within the life-cycle, the size of the sampling unit, number of samples, and distribution of the ... More


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