Table 3.

Outputs from the Mixed models for TVOCs

Mixed model	Brushing and rolling samples
Fixed effects	Estimate	Standard error	Pr (>|t|)
Intercept	−0.19	0.74	0.80
Method (rolling)	1.04	0.38	0.011
Temperature (°C)	0.067	0.036	0.073
Random effects	Sampling days σb = 0.59