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【单选题】
样本均数比较的t检验．P＜0．05，按α=0．05水准，认为两总体均数不同。此时若推断有错，则犯第Ⅰ类错误的概率P（）A.
P＞0.05
B.
P＜0.05
C.
P=0.05
D.
P=0.01
E.
P=β，而β未知
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【单选题】What change has been observed in today's young Japanese women?
A.
They pay less attention to their linguistic behavior.
B.
They use fewer of the deferential linguistic forms.
C.
They confuse male and female forms of language.
D.
They employ very strong linguistic expressions.
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A.
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B.
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C.
两组无前测实验设计
D.
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A.
beyond
B.
within
C.
outside
D.
off
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A.
People will notify the city government of the traffic problem.
B.
People will not go outside because of heavy traffic.
C.
People will walk all together from Memorial park to City Hall to celebrate their success.
D.
There will be a road construction by city government.
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A.
beyond
B.
within
C.
outside
D.
off
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