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【单选题】
若分析肺活量和体重之间的数量关系,如果P>0.05,回归系数即斜率较大,b=10,则说明
A.
体重对肺活量影响很大
B.
体重不影响肺活量
C.
体重和肺活量存在着回归关系
D.
体重与肺活量存在着相关关系
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【简答题】阅读理解。 Beijing-old and new Fifty years ago, if you flew over Beijing and looked down on the city, it looked like an army camp. The whole city was laid out in regular squares. In the middle was the Forb...
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