Table 2.

Statistics of validation during external tests for fluorine. RMSEP: root mean standard error of prediction; V-set: validation set.

Parameter	Fluorine
Units	ppm
#samples	15
Outliers	0
Min	0.00
Mean	413.20
Max	800.00
SD	258.46
RMSEP	61.08
R2EX.V	0.8955
NIR repeatability	0.20
Bias	0.05
Intercept	37.46
Slope	0.85
DW	1.84
V-Set Durbin-Watson in range 1.5 to 2.5?	yes