Characteristics

Number

± SD (Knowledge about waste management)

F/t test

p-value

Age range (Years)

≤30

8

6.5 ± 2.1

31 - 40

218

7.4 ± 2.9

0.385

0.764

41 - 50

28

7.7 ± 3.0

≥51

2

7.5 ± 3.5

Sex

Male

201

7.4 ± 3.0

0.653

0.514

Female

55

7.7 ± 2.4

Education

Completed primary school

28

7.4 ± 3.0

Completed secondary school

115

7.2 ± 2.9

0.764

0.467

Tertiary education

113

7.7 ± 2.7

Years in operation

≤5

143

7.9 ± 2.7

4.270

0.006

6 - 10

83

6.5 ± 2.8

11 - 15

26

7.7 ± 3.1

≥16

4

8.0 ± 2.1