Independent variable

Mean value

Standard deviation

Maximum value

Minimum value

X1 (year)

43.12

18.90

85

21

X2 (year)

2.55

1.21

13

0

X3 (person)

3.97

2.15

11

1

X4 (person)

1.32

0.60

5

0

X5 (hm²)

0.211

0.135

1.589

0

X6 (hm²)

0.576

0.680

7.546

0

X7 (m²)

131.23

19.31

220

46

X8 (LU)

5.90

24.63

200

0

X9 (yuan)

6010.32

1543.12

17563.21

1098.86

X10 (yuan)

533.81

352.36

16597.20

0

X11 (1 = Yes; 0 = No)

0.39

0.25

1

0

X12 (km)

1189.19

525.57

3500

750

X13 (km)

55.31

42.50

150

0

X14 (1 = Yes; 0 = No)

0.48

0.16

1

0

X15 (1 = Yes; 0 = No)

0.20

0.27

1

0

X16 (1 = Yes; 0 = No)

0.23

0.18

1

0