Table 5. Fit Summary Statistics for the Model Prediction^a.

source	sum of squares	df	mean square	F-value	p-value	remark
mean vs total	1.761 × 105	1	1.761 × 105
linear	29.87	3	9.96	0.899	0.4628
2Fl	21.59	3	7.20	0.6019	0.6252
quadratic	143.68	3	47.89	40.71	<0.0001	suggested
cubic	10.52	4	2.63	12.67	0.0044
residual	1.25	6	0.2076
total	1.763 × 105	20	8816.01

^adf is the degree of freedom.