Solution for Ex M 7.01 say “For imbalanced classification problems, the "most_frequent" strategy is the strongest of the three baselines and therefore the one we should use” However I feel this would just predict the majority imbalanced class - so not sure how it can be a good baseline.
In terms of accuracy, it will provide the highest score for a dummy classifier. Therefore, it indicates the level of accuracy that one should beat to have a classifier that learns something from the data X.
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