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 |