Biometrical Letters vol. 43(2), 2006, pp.79-89
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A COMPARISON OF SOME METHODS OF DETECTING INFLUENTIAL OBSERVATIONS IN STUDIES OF APHIDOFAUNA Anna Budka1, Maria Kozłowska1, Barbara Wilkaniec2 1Department of Mathematical and Statistical Methods, Agricultural University of Poznań, Wojska Polskiego 28, 60-637 Poznań, e-mail: markoz@au.poznan.pl 2Department of Entomology, Agricultural University of Poznań, D±browskiego 159, 60-594 Poznań, e-mail: wilk@au.poznan.pl |
Four methods for the detection of influential observations are described. The identification of observations having an influence on the linear regression model of the structure of the aphid population and their subsequent elimination from the dataset are non-trivial tasks, when the main purpose is to determine the significance of the regression coefficient for precipitation. In this paper a comparison of the effectiveness of the described methods for studies of aphidofauna is presented and discussed.
Influential observation, multiple polynomial regression, aphidofauna
