Jonah, leaning back in a swivel chair that squeaked with every breath, spun a pen around his thumb. "Did you center the data?"
[ \textVariance of x \ (s^2_x) = \fracS_xxn - 1 ] for a , and [ \textVariance of x \ (\sigma^2_x) = \fracS_xxn ] for a population . Sxx Variance Formula
Sxx=∑(xi−x̄)2cap S sub x x end-sub equals sum of open paren x sub i minus x bar close paren squared : Individual data points. : The mean (average) of the data. : The sum of all calculated differences. 2. The Computational Formula Jonah, leaning back in a swivel chair that