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Confidence Sets for Statistical Classification (II): Exact Confidence Sets

Author

Listed:
  • Wei Liu

    (S3RI, School of Mathematics University of Southampton, Southampton SO17 1BJ, UK)

  • Frank Bretz

    (Novartis Pharma AG, 4002 Basel, Switzerland)

  • Anthony J. Hayter

    (Department of Statistics and Operations Technology, University of Denver, Denver, CO 80208, USA)

Abstract

Classification has applications in a wide range of fields including medicine, engineering, computer science and social sciences among others. Liu et al. (2019) proposed a confidence-set-based classifier that classifies a future object into a single class only when there is enough evidence to warrant this, and into several classes otherwise. By allowing classification of an object into possibly more than one class, this classifier guarantees a pre-specified proportion of correct classification among all future objects. However, the classifier uses a conservative critical constant. In this paper, we show how to determine the exact critical constant in applications where prior knowledge about the proportions of the future objects from each class is available. As the exact critical constant is smaller than the conservative critical constant given by Liu et al. (2019), the classifier using the exact critical constant is better than the classifier by Liu et al. (2019) as expected. An example is provided to illustrate the method.

Suggested Citation

  • Wei Liu & Frank Bretz & Anthony J. Hayter, 2019. "Confidence Sets for Statistical Classification (II): Exact Confidence Sets," Stats, MDPI, vol. 2(4), pages 1-8, November.
    • Handle: RePEc:gam:jstats:v:2:y:2019:i:4:p:30-446:d:284502
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    References listed on IDEAS

    as
    1. Wei Liu & Frank Bretz & Natchalee Srimaneekarn & Jianan Peng & Anthony J. Hayter, 2019. "Confidence Sets for Statistical Classification," Stats, MDPI, vol. 2(3), pages 1-15, June.
    2. W. Liu & Y. Han & F. Bretz & F. Wan & P. Yang, 2016. "Counting by weighing: know your numbers with confidence," Journal of the Royal Statistical Society Series C, Royal Statistical Society, vol. 65(4), pages 641-648, August.
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    1. Wei Liu & Frank Bretz & Natchalee Srimaneekarn & Jianan Peng & Anthony J. Hayter, 2019. "Confidence Sets for Statistical Classification," Stats, MDPI, vol. 2(3), pages 1-15, June.

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