问答题

同等剂量的药品采用不同的服用方式往往取得不同的效果,方案A是在每日三餐后服用,方案B是每日仅仅服用一次相同总剂量的药品。对病情相似的20-44岁的患者进行随机抽样,测试所服药品在消化道中的中转时间,选择服用方案的顺序是随机的。下表给出了12名患者分别按方案A和方案B服用后,药品在消化道中的中转时间。

试求总体均值的置信水平为95%的置信区间。

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