Type of job

Sample size

The upper quartile

The lower quartile

Mode

Mean

Standard deviation

Skewness

Kurtosis

The lower age limit

Handyman

1159

18

20

18

19.37

3.244

2.485

8.793

Technician

1263

18

25

20

22.24

4.288

1.145

1.666

Engineer

1066

23

28

25

25.92

4.399

1.195

3.411

Manager

1010

25

30

30

28.74

4.408

0.255

−0.059

The upper age limit

Handyman

1159

35

45

45

39.29

7.067

−0.009

−0.325

Technician

1263

35

45

45

41.22

6.402

−0.167

−0.034

Engineer

1066

35

45

35

40.46

6.945

0.542

0.023

Manager

1010

35

45

45

41.45

6.085

0.110

0.050