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【单选题】
用某种中成药治疗高血压患者100名,总有效率为80.2%,标准误为0.038,则总有效率的95%可信区间估计为A.
0.802±1.64×0.038
B.
0.802±1.96×0.038
C.
0.802±2.58×0.038
D.
＞0.802-1.64×0.038
E.
＞0.802+1.64×0.038
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