An application of mixed-effects model to evaluate the role of age and size on radial variation in wood specific gravity in teak (Tectona grandis)

Journal of Wood Science

Official Journal of the Japan Wood Research Society

Table 13 Posterior summary and intervals

Parameter	N	Mean	Standard deviation	95% HPD interval
Radii 1	5000	0.6061	0.0405	0.5300	0.6842
Radii 2	5000	0.6010	0.0414	0.5235	0.6804
RRD	5000	0.00543	0.00120	0.00312	0.00788
RRD*Radii 1	5000	− 0.00060	0.00167	− 0.00385	0.00269
Residual Var	5000	0.00468	0.000834	0.00319	0.0063
Residual AR(1)	5000	0.8521	0.0255	0.8022	0.9006
Random Var	5000	0.00426	0.0127	0.000100	0.0141

N independent MCMC samples, HPD highest posterior density which is defined by the 2.5th and 97.5th percentiles. Residual Var gives the within-tree variance statistic. Residual AR(1) gives the first-order autocorrelation parameter. Random Var gives the between-tree variance