| 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 |