∑x=2+4+6+8+10=30sum of x equals 2 plus 4 plus 6 plus 8 plus 10 equals 30
Sxxn−1the fraction with numerator cap S sub x x end-sub and denominator n minus 1 end-fraction Average squared distance from the mean Sxx Variance Formula
The computational formula is an algebraically rearranged version of the definitional formula. It is highly preferred when calculating Sxx by hand or writing code because it reduces rounding errors and requires fewer steps. ∑x=2+4+6+8+10=30sum of x equals 2 plus 4 plus
b1=SxySxxb sub 1 equals the fraction with numerator cap S x y and denominator cap S x x end-fraction Sxx Variance Formula
s2=∑(xi−x̄)2n−1s squared equals the fraction with numerator sum of open paren x sub i minus x bar close paren squared and denominator n minus 1 end-fraction
