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皮皮学刷刷变学霸
举一反三
【多选题】相关分析和回归分析说法正确的是( )。
A.
相关分析的目的在于测度变量之间的关系密切程度，它所使用的测度工具就是相关系数
B.
回归分析则侧重于考查变量之间的数量伴随关系并通过一定的数学表达式将这种关系描述出来
C.
在做定量分析之前，可以用相关表和散点图来大致判断相关关系
D.
回归分析与相关分析无直接联系
E.
只有当变量之间存在着高度相关时，进行回归分析寻求其相关的具体形式才有意义
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【单选题】---I’m going to Hangzhou for a holiday this weekend. --- ___ you are there, could you buy me some green tea?
A.
Because
B.
While
C.
During
D.
As
【简答题】Read the article below. In most of the lines 34—45 there is one extra word. It is either grammatically incorrect or does not fit in with the meaning of the text. Some lines, however, are correct. If a...
【简答题】阅读理解。 Do you believe there are aliens (外星人) ? Well, make a phone call and you will know. A group of Americans can help. They make a device 'talk' to aliens. If you want to talk to an alien, you only n...
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