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大米袋的重量有 mu = 70 公斤和 sigma = 10 公斤。对于 n = 64 的样本,计算 P(68 <= \bar X <= 72) 。
大米袋的重量有 mu = 70 公斤和 sigma = 10 公斤。对于 n = 64 的样本,计算 P(68 <= \bar X <= 72) 。
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