某试样中 Ca 2+ 含量平均值的置信区间为42.26%±0.10%(置信度为95%),对此结果应理解为
A.
在95%的置信度下,试样中 Ca 2+ 的含量在42.16%~42.36%之间
B.
有95%的把握试样中 Ca 2+ 的含量为42.16%
C.
有95%的把握试样中 Ca 2+ 的含量为42.26%
D.
有95%的把握试样中 Ca 2+ 的含量为42.36%
拍照语音搜题,微信中搜索"皮皮学"使用
参考答案:
参考解析:
知识点:
皮皮学刷刷变学霸
举一反三
【简答题】Passage Two Throughout history, humans have suffered from a condition that they have never been able to escape—ageing. Some researchers, however, believe we may be thinking about it in the wrong way. ...
【单选题】Ming and Qing Tombs have ________ relatively undamaged.They, ________, have suffered some damage from centuries of exposure, war, fire and deliberate destruction. [ ]
【单选题】Ming and Qing tombs have ______ relatively undamaged. They, ______, have suffered some damage fr
A.
79. Ming and Qing tombs have ______ relatively undamaged. They, ______, have suffered some damage from centuries of exposure, wars and deliberate destruction. A.left; nevertheless