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电池续航时间: n = 40 , \bar X = 520 小时, s = 60 小时。构造95%置信区间。厂商声称平均续航500小时,数据是否支持?
电池续航时间: n = 40 , \bar X = 520 小时, s = 60 小时。构造95%置信区间。厂商声称平均续航500小时,数据是否支持?
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