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Defining Regressor Variables

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/9780195124408.003.0007
Subject:
Public Health and Epidemiology, Public Health, Epidemiology

The coding of categorical variables can result in very different values for the parameters in a regression model, but when they are correctly understood in term of effects on estimates of risk, they ... More


Analysis of Covariance: ANCOVA

Andy Hector

in The New Statistics with R: An Introduction for Biologists

Published in print:
2015
Published Online:
March 2015
ISBN:
9780198729051
eISBN:
9780191795855
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780198729051.003.0007
Subject:
Biology, Biomathematics / Statistics and Data Analysis / Complexity Studies, Ecology

ANCOVA of designed experiments combines one categorical and one continuous explanatory variable. Panel plots are usually the best way to graphically display ANCOVA designs with a separate linear ... More


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