The application of orthogonal contrasts to determine homogeneous groups
Zbigniew Laudański
Plant Breeding and Acclimatization Institute — National Research Institute in Radzików, Poland (Poland)
Dariusz Mańkowski
d.mankowski@ihar.edu.plPlant Breeding and Acclimatization Institute - National Research Institute (Poland)
https://orcid.org/0000-0002-7499-8016
Leszek Sieczko
Institute of Agriculture — Warsaw University of Life Sciences, Poland (Poland)
Monika Janaszek-Mańkowska
Institute of Mechanical Engineering — Warsaw University of Life Sciences, Poland (Poland)
Abstract
The paper presents a modified approach to analysis of data obtained from experiments carried out according to classical factorial designs. Four examples were discussed in order to present details of proposed method. Modification of the analysis of variance presented here enables more effective use of information on how studied factors affect the means of dependent variable. The specificity of this approach is based on alternative multiple comparison procedure incorporating orthogonal contrasts to determine homogeneous groups.
Keywords:
experiment, data analysis, linear model, ANOVA, multiple comparisons, orthogonal contrastsReferences
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Authors
Zbigniew LaudańskiPlant Breeding and Acclimatization Institute — National Research Institute in Radzików, Poland Poland
Authors
Dariusz Mańkowskid.mankowski@ihar.edu.pl
Plant Breeding and Acclimatization Institute - National Research Institute Poland
https://orcid.org/0000-0002-7499-8016
Authors
Leszek SieczkoInstitute of Agriculture — Warsaw University of Life Sciences, Poland Poland
Authors
Monika Janaszek-MańkowskaInstitute of Mechanical Engineering — Warsaw University of Life Sciences, Poland Poland
Statistics
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