| Category | General workers | Special workers | Work leaders | Wood cutters | ||||
|---|---|---|---|---|---|---|---|---|
| Year | 2021 | 2022 | 2021 | 2022 | 2021 | 2022 | 2021 | 2022 |
| N | 206 | 206 | 199 | 199 | 178 | 178 | 165 | 165 |
| Mean(Korean won) | 147,437 | 163,376 | 199,799 | 221,407 | 227,777 | 250,045 | 216,635 | 239,863 |
| Standard deviation | 18,194.20 | 20,124.30 | 32,206.70 | 34,881.20 | 41,519.40 | 46,311.00 | 33,853.90 | 40,200.10 |
| t(p) | −17.827(0.000) | −17.907(0.000) | −17.226(0.000) | −15.841(0.000) | ||||