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【单选题】
根据两个独立的小样本估计两个正态总体均值之差时,当两个总体的方差未知时,使用的分布是( ).A.
正态分布
B.
t 分布
C.
D.
F 分布
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反馈参考答案：
举一反三
【简答题】数据预处理是指在对数据进行挖掘前对原始数据进行 、 、 与 等一系列处理工作,以达到挖掘算法进行知识获取研究所需要的最低规范和标准。
【简答题】用所给词的适当形空。 l. He got some (money) from his manager yesterday. 2. Dave (come) to our house for dinner tonight. 3. Mother (buy) some fruit an hour ago. 4. You'd better take him for (walk) every day. 5. ...
【简答题】The new manager is very strict with his workers, lie requests that every worker ( not be late) ______ for work.
【简答题】外国建筑发展经历了哪些阶段?
【单选题】听力原文：W：Sorry to disturb you, manager. But I was wondering if you had got a chance to look at my project proposal. M：Oh, I nearly forget it. I know you gave it to me over half a month ago, but to be ho...
A.
He has no time to read the project proposal.
B.
The girl's proposal was terribly written.
C.
It's not his responsibility to help the girl.
D.
Half a month is not enough to write a proposal.
【简答题】Ask any manager who the most valuable member of his team is, and he will point not to the ___6___superstarA) chronic F) differentiate K) IncorporateB) coherently G) discarded L) overratedC) dedicated...
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