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Official Journal of the Japan Wood Research Society

Table 10 Between-subject comparison with AR(1) + RE structure. Differences in mean WSG between long radius (growing rapidly) and short radius (growing slowly) are almost same over time (RRD)

From: 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)

Parameter

Estimate

Std error

DF

t Value

Pr >|t|

Radii 1–2 avg. over RRD 1–10

0.002417

0.01656

338

0.15

0.8840

Radii 1–2 RRD 1

− 0.00122

0.02099

338

− 0.06

0.9536

Radii 1–2 RRD 2

− 0.00400

0.02099

338

− 0.19

0.8490

Radii 1–2 RRD 3

0.01911

0.02099

338

0.91

0.3633

Radii 1–2 RRD 4

0.005222

0.02099

338

0.25

0.8037

Radii 1–2 RRD 5

0.009333

0.02099

338

0.44

0.6569

Radii 1–2 RRD 6

− 0.00217

0.02099

338

− 0.10

0.9179

Radii 1–2 RRD 7

− 0.00444

0.02099

338

− 0.21

0.8325

Radii 1–2 RRD 8

0.007722

0.02099

338

0.37

0.7132

Radii 1–2 RRD 9

0.005611

0.02099

338

0.27

0.7894

Radii 1–2 RRD 10

− 0.01100

0.02099

338

− 0.52

0.6007

  1. DF degree of freedom