假定血糖在常规实验室20天测定的质控结果的均数为5.5Smmol/L,标准差为0.5mmol`L,如果采用R4S规则,其失控制界限为()A下限为5mmol/L,上限为6mmol/LB下限为4mmol/L,上限为7mmol/LC下限为4.5mmol/L,上限为6.5mmol/LD下限为4mmol/L,上限为6.5mmol/LE下限为3.5mmol/L,上限为7.5mmol/L
题目
假定血糖在常规实验室20天测定的质控结果的均数为5.5Smmol/L,标准差为0.5mmol`L,如果采用R4S规则,其失控制界限为()
A下限为5mmol/L,上限为6mmol/L
B下限为4mmol/L,上限为7mmol/L
C下限为4.5mmol/L,上限为6.5mmol/L
D下限为4mmol/L,上限为6.5mmol/L
E下限为3.5mmol/L,上限为7.5mmol/L