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最好是根据单个测量值来估计平均值,或者将它们分组以减少变化并估计所有组的平均值,这是什么?
显然,当我们对单个值进行分组时,考虑所有组均值的标准偏差要小于单个值的标准偏差。因此,为了减少所有值均值附近的差异,是否有可能在可能的情况下对各个值进行分组?
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