fig 3.

A and B, Histograms of observed distribution of the readings of single measurements (surface, A) and double measurements (sulci, B) with the expected normal distribution computed with the SD around the mean. The normal, symmetrical, expected distribution does not satisfactorily fit the observed data of the single and double measurements. Kolmogorov-Smirnov test: D = .15094 for single measurements, and D = .15830 for double measurements; P < .05 for both measurements. Lilliefors test: P < .01 for both measurements. All tests were significant, demonstrating an insufficient goodness-of-fit of the expected normal distribution with the observed frequencies