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    The bradley-terry model for handling categorical response variables from farmer participatory trials

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    Date
    2006
    Author
    Coe, Richard
    Muchiri, Mary w.
    Weke, Patrick G. O.
    Type
    Article
    Language
    en
    Metadata
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    Abstract
    This paper looks at responses from participatory on-farm farmer participatory trials that are often measured as ratings (farmers score each given treatment on a scale that is ordered but arbitrary) or rankings (where farmers arrange the treatments in order from most preferred to least preferred). Simple methods such as the preference statistic that uses the proportion of responses, Kruskal-Wallis test which is a one-way analysis of variance by ranks and the Friedman test that is a two-way analysis of variance by ranks are outlined. The Bradley-Terry model for ranks which is a logit model for paired comparisons is described and used to fit models for plot level covariates.
    URI
    http://erepository.uonbi.ac.ke:8080/xmlui/handle/123456789/32376
    Citation
    Far East J. Thea. Stat. 20(2)(2006), 163-178
    Publisher
    Pushpa publishing house
     
    Department of Mathematics University of Nairobi, Kenya
     
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    • Faculty of Science & Technology (FST) [4284]

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