| years of service | Kolmogorov-Smirnova | Shapiro-Wilk | ||||
| Statistic | df | Sig. | Statistic | df | Sig. | |
| 1 - 10 | 0.088 | 34 | 0.200* | 0.976 | 34 | 0.634 |
| 11 - 20 | 0.158 | 63 | 0.000 | 0.934 | 63 | 0.002 |
| 21 - 30 | 0.112 | 21 | 0.200* | 0.946 | 21 | 0.287 |
| 31 - 40 | 0.098 | 23 | 0.200* | 0.955 | 23 | 0.362 |