Table 6 Descriptive statistics of variables.

From: Formulation of low temperature mixed mode crack propagation behavior of crumb rubber modified HMA using artificial intelligence

Variable ID

Average

Standard deviation

Minimum

Maximum

Main input variables

 Gf0 (Pa)

672.5

230.9

203.7

1343.5

 Gb0 (Pa)

191.9

89.7

36.9

456.7

 Gi0 (Pa)

1.6

0.8

0.2

4.5

 γ (%)

0.26

0.2

0

0.47

 B (%)

4.5

0.4

4

5

 CRC (%)

10

8.2

0

20

 T (°C)

− 7.5

8.5

− 20

5

 AT

0

1

 NMAS (mm)

19

25

Output variables

 Gf (Pa)

1085.6

559.5

203.7

3060.8

 Gb (Pa)

294.8

203.4

36.9

1487.8

 Gi (Pa)

2.4

1.7

0.2

11.2