| Variable | No | Male | No | Female | ||
| Mean | SD | Mean | SD | |||
| The weight of the conventional generator is too heavy for me. | 112 | 3.78 | 1.18 | 309 | 4.22 | 0.91 |
| The use of the conventional generator has any effect on you as a person. | 107 | 2.85 | 1.56 | 309 | 3.28 | 1.50 |
| The operation of the conventional generator is difficult for me. | 112 | 3.11 | 1.20 | 309 | 3.85 | 1.00 |