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Answers for “为什么替换异常值后关于额外课程的决策会发生逆转?”

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Replacing an outlier with a typical value removes the extreme inflation from the sum of the dataset. This causes the arithmetic mean to drop significantly, reflecting the true central tendency of the majority of the data.

Conditions: The original dataset contains an outlier.; The replacement value is consistent with the majority of the data.; The sample size remains unchanged.