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Determining Sample Size: Balancing Power, Precision, and Practicality

Patrick Dattalo

Published in print:
2008
Published Online:
January 2009
ISBN:
9780195315493
eISBN:
9780199865475
Item type:
book
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780195315493.001.0001
Subject:
Social Work, Research and Evaluation

Sample size determination is an important and often difficult step in planning an empirical study. From a statistical perspective, sample size depends on the following factors: type of analysis to be ... More


The Dissertation: From Beginning to End

Peter Lyons and Howard J. Doueck

Published in print:
2009
Published Online:
February 2010
ISBN:
9780195373912
eISBN:
9780199865604
Item type:
book
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780195373912.001.0001
Subject:
Social Work, Research and Evaluation

This book is intended to be read at any stage in the dissertation process, but will be particularly useful in the early stages of preparation for a social work dissertation, and as a reference ... More


Sampling and Measurement

Peter Lyons and Howard J. Doueck

in The Dissertation: From Beginning to End

Published in print:
2009
Published Online:
February 2010
ISBN:
9780195373912
eISBN:
9780199865604
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780195373912.003.0005
Subject:
Social Work, Research and Evaluation

This chapter examines participant selection, sampling design, sample size and sampling error; as well as the importance of statistical power, effect size, confidence levels, and confidence intervals. ... More


Down to detail

Marian Stamp Dawkins

in Observing Animal Behaviour: design and analysis of quantitative data

Published in print:
2007
Published Online:
January 2008
ISBN:
9780198569350
eISBN:
9780191717512
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780198569350.003.0006
Subject:
Biology, Animal Biology

An important part of the planning of any project is the construction of a detailed protocol or research plan. This should be detailed enough that someone else could read it and see exactly what was ... More


Single-Scale Sampling

Thomas J. Stohlgren

in Measuring Plant Diversity: Lessons from the Field

Published in print:
2006
Published Online:
September 2007
ISBN:
9780195172331
eISBN:
9780199790395
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780195172331.003.0004
Subject:
Biology, Plant Sciences and Forestry

This chapter provides examples and discusses several single-scale sampling techniques for measuring plant diversity. Common techniques include: searching, where a species list is obtained for a site, ... More


Study Design

Neil Abell, David W. Springer, and Akihito Kamata

in Developing and Validating Rapid Assessment Instruments

Published in print:
2009
Published Online:
September 2009
ISBN:
9780195333367
eISBN:
9780199864300
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780195333367.003.0003
Subject:
Social Work, Research and Evaluation

This chapter provides an overview of the design of the psychometric study. First, sampling issues are addressed, including who should be recruited and in what numbers, with guidance on anticipating ... More


The use of value of information methods in the design and evaluation of clinical trials

Andrew R. Willan

in Economic Evaluation in Child Health

Published in print:
2009
Published Online:
February 2010
ISBN:
9780199547494
eISBN:
9780191720055
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780199547494.003.05
Subject:
Public Health and Epidemiology, Public Health, Epidemiology

This chapter illustrates the use of value of information methods in determining sample size for pediatric clinical trials and for summarizing trial results, underscoring the particular advantage ... More


Computer-Intensive Methods

Patrick Dattalo

in Determining Sample Size: Balancing Power, Precision, and Practicality

Published in print:
2008
Published Online:
January 2009
ISBN:
9780195315493
eISBN:
9780199865475
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780195315493.003.0004
Subject:
Social Work, Research and Evaluation

This chapter provides a brief description of the rationale and limitations of CISs; presents an example of how CISs can be used to determine sample size; and identifies additional CISs related ... More


Sample size and power estimates

Curtis L. Meinert and Susan Tonascia

in Clinical Trials: Design, Conduct and Analysis

Published in print:
1986
Published Online:
September 2009
ISBN:
9780195035681
eISBN:
9780199864478
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780195035681.003.0009
Subject:
Public Health and Epidemiology, Public Health, Epidemiology

This chapter discusses the role of sample size and power estimates in planning a trial. It details the methods for making such calculations in trials involving fixed sample designs.


Basic Terms and Concepts

Patrick Dattalo

in Determining Sample Size: Balancing Power, Precision, and Practicality

Published in print:
2008
Published Online:
January 2009
ISBN:
9780195315493
eISBN:
9780199865475
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780195315493.003.0001
Subject:
Social Work, Research and Evaluation

This chapter defines important terms and concepts. It a familiarity with issues related to the appropriate application of each statistical procedure in terms of assumptions and purpose. The chapter ... More


Planning Studies: Estimating Power and Sample Size

Ezra Susser, Sharon Schwartz, Alfredo Morabia, and Evelyn J. Bromet

in Psychiatric Epidemiology: Searching for the Causes of Mental Disorders

Published in print:
2006
Published Online:
September 2009
ISBN:
9780195101812
eISBN:
9780199864096
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780195101812.003.24
Subject:
Public Health and Epidemiology, Public Health, Epidemiology

Human research studies can be very difficult to conduct, very time-consuming to complete, and extremely costly. They require tremendous commitment from the investigators involved, as well as from all ... More


Requirements for Conducting Confirmatory Factor Analysis: Data Considerations

Donna Harrington

in Confirmatory Factor Analysis

Published in print:
2008
Published Online:
January 2009
ISBN:
9780195339888
eISBN:
9780199863662
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780195339888.003.0003
Subject:
Social Work, Research and Evaluation

This chapter presents the requirements for conducting a confirmatory factor analysis (CFA). Types of missing data, as well as methods of checking for and addressing missing data, such as imputation, ... More


3. Sampling, study size, and power

Tim J. Cole

in Design Concepts in Nutritional Epidemiology

Published in print:
1997
Published Online:
September 2009
ISBN:
9780192627391
eISBN:
9780191723704
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780192627391.003.0003
Subject:
Public Health and Epidemiology, Public Health, Epidemiology

Precise definitions of study populations and samples are key to the interpretation and generalizability of findings. This chapter describes types of sampling, how to deal with non-response, and ... More


Power and Sample Size Requirements

Theodore R. Holford

in Multivariate Methods in Epidemiology

Published in print:
2002
Published Online:
September 2009
ISBN:
9780195124408
eISBN:
9780199864270
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780195124408.003.0011
Subject:
Public Health and Epidemiology, Public Health, Epidemiology

This chapter considers the sample size and power aspects of study design. It considers sample size from the perspective of estimation, in which the confidence interval indicated the level of ... More


Statistical Power and Sample Size Calculations

Steve Selvin

in Statistical Analysis of Epidemiologic Data

Published in print:
2004
Published Online:
September 2009
ISBN:
9780195172805
eISBN:
9780199865697
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780195172805.003.03
Subject:
Public Health and Epidemiology, Public Health, Epidemiology

This chapter discusses the power of a statistical test and the closely related issue of sample size. Topics covered include normal distribution, Poisson distribution, sample size, and loss of ... More


11. Gene–nutrient interactions in nutritional epidemiology

Lenore Kohlmeier, David DeMarini, and Walter Piegorsch

in Design Concepts in Nutritional Epidemiology

Published in print:
1997
Published Online:
September 2009
ISBN:
9780192627391
eISBN:
9780191723704
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780192627391.003.0011
Subject:
Public Health and Epidemiology, Public Health, Epidemiology

There is increasing evidence that the ways in which nutrients are handled metabolically is, to a greater or lesser extent, under genetic control. Equally, nutrient (and non-nutrient) intakes affect ... More


Sampling Error: The Need for Representativeness

in The Total Survey Error Approach: A Guide to the New Science of Survey Research

Published in print:
2005
Published Online:
March 2013
ISBN:
9780226891279
eISBN:
9780226891293
Item type:
chapter
Publisher:
University of Chicago Press
DOI:
10.7208/chicago/9780226891293.003.0010
Subject:
Political Science, American Politics

The best-known source of survey error is sampling error: the error that arises when only a subset of the population is included in a sample survey. It occurs since sampled units inevitably differ ... More


Introduction to Regression Modeling Introduction to Regression Modeling

John G. Orme and Terri Combs-Orme

in Multiple Regression with Discrete Dependent Variables

Published in print:
2009
Published Online:
May 2009
ISBN:
9780195329452
eISBN:
9780199864812
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780195329452.003.0001
Subject:
Social Work, Research and Evaluation

This chapter is a brief review of some major concepts of linear regression, presented in the context of simple examples using both dichotomous and continuous independent variables. The chapter ... More


Homogeneous Populations

Raymond L. Chambers and Robert G. Clark

in An Introduction to Model-Based Survey Sampling with Applications

Published in print:
2012
Published Online:
May 2012
ISBN:
9780198566625
eISBN:
9780191738449
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780198566625.003.0003
Subject:
Mathematics, Probability / Statistics

This chapter describes the simplest possible model for a finite population: the homogeneous population model. It is appropriate when there is no auxiliary information that can distinguish between ... More


Analysis of Multiple Dependent Variables

Patrick Dattalo

Published in print:
2013
Published Online:
May 2013
ISBN:
9780199773596
eISBN:
9780199332564
Item type:
book
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780199773596.001.0001
Subject:
Social Work, Research and Evaluation

Multivariate procedures allow social workers and other human services researchers to analyze complex, multidimensional social problems and interventions in ways that minimize oversimplification. This ... More


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