被同学2020-11-21 15:49:46
被同学2020 Mock Exam B - Morning Session 第10题： 10 Using Exhibit 3 and Quinn’s reminder, the most appropriate measure of the accuracy of the model is: A 0.79. B 0.86. C 0.92. 文字描述： After running his model on the test set, Quinn produces a confusion matrix for evaluating the performance of the model (Exhibit 3). He reminds Wu that since the number of defaults in the dataset is likely much smaller than the number of non-defaults, this needs to be considered in evaluating model performance. ——通过这段文字，怎么能判断出题人要我用FIscore算， 而不是用Accurancy算？？
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Kevin2020-11-23 09:13:07
Kevin同学你好！
这个需要判断。
F1 score is more appropriate (than accuracy) when unequal class distribution is in the dataset and it is necessary to measure the equilibrium of precision and recall.
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这是什么知识点，能用中文说一遍吗？
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同学你好！
当数据分布不均匀，需要同时考虑precision和recall，F1 score比accuracy更适合。
本题中，number of defaults in the dataset is likely much smaller than the number of non-defaults，因此符合这个标准。
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