Update ch20.md #64

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snowflowersnowflake wants to merge 1 commit into deeplearning-ai:master from snowflowersnowflake:patch-2

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snowflowersnowflake commented Jun 17, 2022

revise to a better expression


          Update ch20.md

2f5301a

kinghmy commented Jun 17, 2022 via email

你好，来信我已收到，我会尽快处理，谢谢！

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snowflowersnowflake commented Jun 17, 2022

“来自”指的是取样，在这里不太合适，除非测试集和训练集抽样自同一样本。而实际上测试集应该是作为样本外的，只能说和训练集应当服从相同的分布，具备一致的统计性质。

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