Describe why each of the sections of formula below is an important component for our variance index (e.g., what type of bias is each component trying to eliminate? how would the variance index change if they were removed from the equation?) A. Deviation scores: (X- X) B. The summation of deviation scores: E(X - X) C. Squaring the deviation scores: (X- x)2 D. The denominator: (N- 1)