N

Mean

Std. Deviation

Std. Error

F

Sig.

Casual Worker

1070

24.4178

7.35536

0.22486

1.763

0.172

Technical Staff

108

23.6759

6.76001

0.65048

Engineer

60

25.8833

7.38549

0.95346

Total

1238

24.4241

7.31165

0.20780