Chapter
18
Bivariate Analysis
SUMMARY POINTs
� Coefficient of determination :
2
R : Coefficient of determination
2
R % of the variability of the data can be explained by the regression model � Sum of square residuals :
x x
1 x
2
… x n
y y
1 y
2
… y n
Predicted value of y ŷ
1 ŷ
2
… y ˆn n
1
SS � ( y �yˆ )
�
res i i
n i � 1
� Non-linear regressions :
2
: Sum of square residuals
1 . Quadratic regression 5 . Logarithmic regression 2 . Cubic regression 6 . Power regression 3 . Quartic regression 7 . Logistic regression 4 . Exponential regression
Solutions of Chapter 18
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