In many textbooks, you will see the numerator referred to as (Sum of Squares) or Sxxcap S x x
is large, we have a wide range of data, making our model more robust. Summary Table Sum of Squares ( cap S sub x x end-sub Total variation in the data. Variance ( Average variation in the data. Standard Deviation ( Variation in the original units of the data. step-by-step example Sxx Variance Formula
Similarly, in regression, the coefficient of determination ( R^2 ) is: In many textbooks, you will see the numerator
m=SxySxxm equals the fraction with numerator cap S sub x y end-sub and denominator cap S sub x x end-sub end-fraction 2. Measuring Precision In many textbooks