Table 2. The estimated parameters and fit statistics of the models for predicting the xylem volume utilization rate.
Equation
Model
Parameter
Estimate
S.E.
t-value
Pr > |t|
R
2
S
yx
n
(1)
W
1
a
1
0.9821
0.0130
75.57
<0.0001
0.3030
0.0370
194
a
2
2.9549
0.3564
8.29
<0.0001
(2)
W
2
a
1
−0.0282
0.0125
−2.25
0.0254
0.2837
0.0437
194
a
2
−2.5553
0.2930
−8.72
<0.0001