【单选题】【消耗次数:1】
如果变量x和变量y之间的相关系数为1,说明两变fi之间( )
不存在相关关系
相关程度很低
相关程度显著
完全相关
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相关题目
【单选题】 如果变量x 和变量y 之间的相关系数为 1 ,说明两变量之间( )。
①  不存在相关关系
②  相关程度很低
③  相关程度显著
④  完全相关
【单选题】 如果变量x 和变量y 之间的相关系数为-1,说明两个变量之间是( ) 。
①  高度相关关系
②  完全相关关系
③  完全不相关
④  低度相关关系
【单选题】 如果变量x和变量y之间的相关系数为-1,说明两个变量之间是( )
①  高度相关关系
②  完全相关关系
③  完全不相关
④  低度相关关系
【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
【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
【单选题】 直线相关系数的绝对值接近1时,说明两变量相关关系的密切程度是?
①  完全相关
②  微弱相关
③  无线性相关
④  高度相关
【判断题】 相关系数为+1时,说明两变量安全相关,相关系数为-1时,说明两个变量不相关。
①  正确
②  错误
【单选题】 相关系数的绝对值接近1时,说明两变量相关关系是( )。
①  完全相关
②  微弱相关
③  无线性相关
④  高度相关
【单选题】 相关系数越接近±1,表明变量之间的线性相关程度()
①  越小
②  一般
③  越大
④  不确定
【单选题】 两个变量之间相关程度越强,则相关系数的绝对值( )。
①  越接近于1
②  越接近于0
③  越大于1
④  越小于1
随机题目
【单选题】 His manner was so pleasant that Bolla felt at ____ with him at once.
①  peace
②  large
③  ease
④  best
【单选题】 Research findings show we spend about two hours dreaming every night, no matter what we _________ during the day.
①  must have done
②  would have done
③  should have done
④  may have done
【单选题】 Joseph was very lucky ____ with his life; he almost did not get out of the room.
①  to escape
②  to have escaped
③  to escaping
④  to be escaping
【单选题】 The rescue team must have searched for the missing visitors two days ago, _____?
①  mustn’ t they
②  haven’ t they
③  didn’ t they
④  hadn’ t they
【单选题】 I’ m____ that he didn’ t come.
①  astonished
②  astonishing
③  astonish
④  to astonish
【单选题】 ____ is announced in the papers, our country has launched a large scale movement against smuggling and fraudulent activities in foreign currency exchange deals.
①  What
②  As
③  Which
④  That
【单选题】 The ____ crown jewels are kept in the Tower of London.
①  valued
②  valueless
③  invaluable
④  usable
【单选题】 Though ____ rich, she was better off than at any other period in her life.
①  by means of
②  within her means
③  by all means
④  by no means
【单选题】 You ____ that letter to James. However, you didn’t.
①  ought to write
②  ought to have written
③  should write
④  should be writing
【单选题】 She found herself____ forward more eagerly to the holiday at home.
①  looking
②  bringing
③  desiring
④  expecting