某年某中学体检,测得 100 名高一女生的平均身高平均数=154.0cm,S=6.6cm,该校高一女生中身高在低于 141cm 的比例占总数的:
A. 0.9
B. 0.05
C. 0.975
D. 0.025
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某资料的观察值呈正态分布,理论上有( )的观察值落在范围内:
A. 0.6827
B. 0.9
C. 0.95
D. 0.99
At the news of her son's failure in exams, her face was ___________________ with anger.
He is a man with a ______________ business sense. He has built his initial investment into a large fortune.
John Diamond is ___________ by an unexpected question.