In many research contexts, especially in the biomedical field, after studying and developing a classification system a natural question arises: "Is this accuracy enough high?", or better, "Can we say, with a statistically significant confidence, that our classification system is able to solve the problem"? To answer to this question, we can use the statistical test described in this paper, which is referred in some cases as NIR (No Information Rate or Null Information Rate).

翻译：在许多研究情境，尤其是生物医学领域，在研究和开发分类系统后，一个自然的问题便随之产生：“这个准确率是否足够高？”，或者更确切地说，“我们能否以具有统计显著性的置信度断言，我们的分类系统能够解决该问题？”为了回答这一问题，我们可以采用本文所述的统计检验，该检验在某些情况下被称为 NIR（无信息率或空信息率）。