• 2022-06-19
    对离散数据(xi,yi),i=1,2,...,6,经计算有Σxi=3.5,Σyi=72.6,Σxi2=4.27,Σyi2=753.2,Σxiyi=114.26,线上回归方程可表示为
    A: [img=141x27]1803b4f569d42d1.jpg[/img]
    B: [img=152x27]1803b4f571dd45b.jpg[/img]
    C: [img=140x27]1803b4f57974549.jpg[/img]
    D: [img=151x27]1803b4f5837b70b.jpg[/img]
  • 举一反三