Skip to main content

Table 8 t test for the restrictions imposed for WNSUR

From: Allometric equations for estimating belowground biomass of Androstachys johnsonii Prain

Restriction

Parameter estimate

Standard error

t value

Pr > |t|

Using DBH and TH as independent variables

 Rest1

1.1859

30789.70

0.00

1.0000

 Rest2

0.0102

287.40

0.00

1.0000

 Rest3

1.7386

2664.90

0.00

0.9995

 Rest4

0.0456

77.54

0.00

0.9995

 Rest5

0.0451

68.64

0.00

0.9995

Using only DBH as independent variable

 Rest1

5.3731

3710.80

0.00

0.9989

 Rest2

0.1517

102.70

0.00

0.9988

 Rest3

0.1960

612.20

0.00

0.9987

 Rest4

0.0215

76.40

0.00

0.9988

Using only RCD as independent variable

 Rest1

16.9897

6901.20

0.00

0.9981

 Rest2

0.2539

104.50

0.00

0.9981

 Rest3

0.1317

986.70

0.00

0.9999

 Rest4

0.0112

80.31

0.00

0.9999

  1. Rest1 to Rest5 are the restrictions imposed to each of the regression coefficients, as stated in Eqs. (1–3).