CRM 3734 Lecture Notes - Lecture 6: Girdle, Analysis Of Variance, Linear Regression

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Dont 2 variables sont reli es et varient l"une en fonction de l"autre. + les deux bougent dans la m me direction. Formule: r = r= coe cient de corr lation xi et yi = valeurs obtenues pour chaque variable n= nombre de cas total s= cart type x= variable ind pendant y= variable d pendant. Moyenne=5,5 moyenne =5,5 r = [(220) (10x 5. 5x 5. 5)]/[(10 1)(3. 03x 3. 03)] r = (220 302. 5)/(9x 9. 181) r = 82. 5/82. 62 r = 1. Interpr tation du r: 0,1

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