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• 三点(3,10),(7,20),(11,24)的线*回归方程为(　　)A.=1.75x-5.75       ...

• 问题详情：三点(3,10),(7,20),(11,24)的线*回归方程为()A.=1.75x-5.75            B.=1.75x+5.75C.=-1.75x+5.75       D.=-1.75x-5.75【回答】B.设回归直线方程为=x+,=(x1+x2+x3)=7,=(y1+y2+y3)=18,则===1.75.=-=18-1.75×7=5.75.故=1.75x+5.75.知识点...
• 2021-02-2514180