Short Answer

Interpreting Performance Metrics Notation

An AI research team is evaluating a new language model's performance across several distinct tasks. They use the variable p to represent the performance score on a single evaluation instance. After running numerous tests, they report that pˉsummarization=87.5\bar{p}_{summarization} = 87.5. In the context of this evaluation, what does the expression pˉsummarization\bar{p}_{summarization} specifically represent? Explain both parts of the notation (the bar and the subscript).

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Updated 2025-10-08

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