某市1982年抽样测得100名健康成年男子血胆固醇含量,其均数为180mg/dl,标准差为2mg/dl,计算该人群胆固醇95%的参考值范围为
A.(176.08,183.92)mg/dl
B.(128.40,231.60)mg/dl
C.(140.80,219.20)mg/dl
D.<178.36mg/dl
正确答案是A
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