(X?X)(Y?Y)n?XY??X*?Y7*9318?1890*31.3?b????0.0344n?X?(?X)7*535500?1890?(X?X)
___2222______a??Y?b?X?31.3?0.0344*1890??4.82nn77
?所以简单直线回归方程为: Y=
-4.82+0.0344X
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