26/04/10

R2 = erre al cuadrado
R2=0
R2=+1=0.81
R2=-1

Coeficiente de correlacion

R=n∑xy-∑x∑y
√[n∑x2-(∑x)2][n(∑y2)-( ∑y)2]
Y=a+bx

Sustitución

R= 10(10800)-(220)(450)

√[10(5600)-(220)2][10(22100)-(450)2]


R=10800-99000
√10(5600)-(220)2[(10)(22100)-(450)2]
√[(5600)-(48400)][(221000)-(202300)]


R=9000
√(7600)-(18500)


9000
11857.48709

R=0.759