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The 2016 Wines of Portugal Challenge: general implications of more than 8400 wine-score observations
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Orientador(es)
Resumo(s)
The Wines of Portugal Challenge is an annual competition among
wines produced by over 1000 vintners in over 30 of the country’s
wine growing regions. In 2016, judges assigned scores to over
1300 wines resulting in over 8400 wine-score observations.
Analysis of that large sample yields implications about wine
judges’ ratings that are difficult to detect with statistical
significance in the small samples that are typical of most wine
tastings. The Challenge’s frequency distribution of scores showed
left skewness and local peaks just below the score thresholds for
bronze, silver and gold awards. Student’s t-tests showed that
there were no significant differences in scores assigned by
gender-of-judge, nationality-of-judge and to wines from different
regions. However, judges did assign higher scores to sweet wines
than to other types of wine. While the dispersion in scores was
material, p-values showed that the aggregate order of rating was
very unlikely to be random and the distributions of mean scores
showed that the strengths of judges’ preferences against the
least-preferred wines were stronger than those in favor of the
most-preferred wines. Ties between wines’ mean scores were
common and could be broken by several methods including the
preference probabilities implied by a Plackett-Luce model
Descrição
Palavras-chave
Portugal wine tasting OIV score sheet statistics preference ranking models
Contexto Educativo
Citação
JOURNAL OF WINE RESEARCH, 2017 VOL. 28, NO. 4, 313–325
Editora
Taylor & Francis