Variance Formula | Sxx

: Calculate mean of ( x ): ( \barx = (2+4+6+8+10)/5 = 30/5 = 6 ).

In many textbooks, you will see the numerator referred to as (Sum of Squares) or Sxxcap S x x Sxx Variance Formula

If you are studying statistics for regression analysis, $S_xx$ is a critical component for finding the "Line of Best Fit" ($y = a + bx$). : Calculate mean of ( x ): (

cap S sub x x end-sub equals sum of x squared minus the fraction with numerator open paren sum of x close paren squared and denominator n end-fraction sum of x squared : Sum of the squares of each value. : The square of the total sum of all values. 3. Relationship to Variance cap S sub x x end-sub Sxx Variance Formula