FIGURE 2. Cumulative distribution of GBEF observations for study subjects. Normal model is systematically biased, predicting GBEFs too large below median and too small above median. Nearly perfect fit is obtained with cubic polynomial.
FIGURE 2. Cumulative distribution of GBEF observations for study subjects. Normal model is systematically biased, predicting GBEFs too large below median and too small above median. Nearly perfect fit is obtained with cubic polynomial.