N

Mean

Std. Deviation

Std. Error

F

Sig.

Casual Worker

1070

32.9981

9.61835

0.29404

1.218

0.296

Technical Staff

108

31.5648

9.30307

0.89519

Engineer

60

32.2500

9.21058

1.18908

Total

1238

32.8368

9.57399

0.27210