Sxx Variance: Formula

And the sample standard deviation is:

Used to determine the precision of the slope and intercept. 6. Summary Table Description Sxxcap S sub x x end-sub (Conceptual) Sum of Squared Deviations Sxxcap S sub x x end-sub (Computational) Shortcut calculation Sample Variance ( sx2s sub x squared ) Sxx Variance Formula

s2=Sxxn−1s squared equals the fraction with numerator cap S sub x x end-sub and denominator n minus 1 end-fraction And the sample standard deviation is: Used to

x̄=2+4+6+8+105=305=6x bar equals the fraction with numerator 2 plus 4 plus 6 plus 8 plus 10 and denominator 5 end-fraction equals 30 over 5 end-fraction equals 6 Step 3: Square each of those differences . Step 4: Sum the squared values to find Sxxcap S sub x x end-sub . Sxx Variance Formula