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搜题/搜资源
【判断题】【消耗次数:1】
当相关系数r=0时,就可以肯定现象之间不存在任何相关关系。
①
正确
②
错误
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【判断题】
当直线相关系数R=0时,说明变量之间不存在任何相关关系
①
正确
②
错误
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【判断题】
相关系数r为0表示两个变量之间不存在任何关系()
①
正确
②
错误
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【单选题】
当相关系数r=0时,表明?
①
现象之间完全无关
②
相关程度较小
③
现象之间完全相关
④
无直线相关关系
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【判断题】
判断现象之间是否存在相关关系必须计算相关系数。
①
正确
②
错误
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【判断题】
判断对错:判断现象之间是否存在相关关系必须计算相关系数。( )
①
正确
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错误
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【多选题】
相关系数r=0.9,这表明现象之间存在着?
①
高度相关关系
②
低度相关关系
③
低度负相关关系
④
高度正相关关系
⑤
低度正相关关系
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【单选题】
如果相关系数r=0,则表明两个变量之间()
①
相关程度很低
②
不存在任何相关关系
③
不存在线性相关关系
④
存在非线性相关关系
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【判断题】
只有当相关系数接近+1时,才能说明两变量之间存在高度相关关系。
①
正确
②
错误
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【判断题】
相关系数的大小可以说明两个现象之间的相关关系密切程度。
①
正确
②
错误
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【判断题】
在任何相关条件下,都可以用相关系数说明变量之间相关的密切程度。
①
正确
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The students were running on the playground as fast as they can.
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I think you’ve got to the point ___ a change is needed, otherwise you’ll fail.
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when
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They _ on the programme for almost one week before I joined them, and now we on it as no good results have come out so far.
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had been working; are still working
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had worked; were still working
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have worked; were still working
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Many people who had seen the film were afraid to go to the forest when they remembered the scenes ___ people were eaten by the tiger.
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A candidate for the democratic presidential nomination ______ at this moment.
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being interviewed D. Interviewing
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is being interviewed
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___ is often the case, we have worked out the production plan.
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There are many people ___ only on-line activity is sending and receiving e-mails.
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On his 10th birthday,Marty manages to escape from the zoo and gets onto the subway, ___ he believes that he can go to the wild.
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He ___________ his friends for their help at the hotel now.
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entertained
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was entertaining
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is entertained
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