Table 3. Summary of model performance based on measured responses for a subset of data (Fig. 2).

Dataset	% variance in roughness explained by mean rate	% variance in roughness explained by spatial variation	d.o.f.	T statistic (W-H test of correlations)	P value
A	91.7%	78.2%	4	+1.05	3.52e-01
B	59.0%	88.3%	16	−2.53	2.21e-02
C	63.7%	78.7%	2	−0.32	7.81e-01
Pooled	78.0%	91.1%	22	−2.33	2.96e-02