N

Mean

Std. Deviation

Std. Error

95% Confidence Interval for Mean

Lower Bound

Upper Bound

Age between 20 and 30

216

44.6065

6.22282

0.42341

43.7719

45.4410

Between 30 and 40

129

43.3876

5.96384

0.52509

42.3486

44.4266

Above 40

107

41.2710

8.09678

0.78275

39.7192

42.8229

Total

452

43.4690

6.76245

0.31808

42.8439

44.0941