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一家工厂生产螺栓,平均重量 mu 和标准差 sigma = 50 克。收集 n = 100 个螺栓的样本。计算样本均值的标准误。
一家工厂生产螺栓,平均重量 mu 和标准差 sigma = 50 克。收集 n = 100 个螺栓的样本。计算样本均值的标准误。
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