| Model | sum of square | df | Mean square | F | Sig. | |
| 1 | return | 9.880 | 1 | 9.880 | 15.337 | 0.000b |
| Residual | 162.344 | 252 | 0.644 |
|
| |
| total | 172.224 | 253 |
|
|
| |
| 2 | return | 12.890 | 2 | 6.445 | 10.153 | 0.000c |
| Residual | 159.335 | 251 | 0.635 |
|
| |
| total | 172.224 | 253 |
|
|
| |