| Number of neurons in the hidden layer | |||||
| 5 | 10 | 15 | |||
BBO | Average | 0.866 | Average | 0.868 | Average | 0.866 |
| Stdv | 0.008 | Stdv | 0.007 | Stdv | 0.006 |
| Best | 0.880 | Best | 0.877 | Best | 0.875 |
GA | Average | 0.830 | Average | 0.829 | Average | 0.830 |
| Stdv | 0.019 | Stdv | 0.019 | Stdv | 0.014 |
| Best | 0.863 | Best | 0.857 | Best | 0.855 |
PSO | Average | 0.801 | Average | 0.795 | Average | 0.795 |
| Stdv | 0.006 | Stdv | 0.011 | Stdv | 0.010 |
| Best | 0.810 | Best | 0.810 | Best | 0.814 |
DE | Average | 0.772 | Average | 0.770 | Average | 0.770 |
| Stdv | 0.008 | Stdv | 0.014 | Stdv | 0.011 |
| Best | 0.783 | Best | 0.793 | Best | 0.785 |
ACO | Average | 0.756 | Average | 0.751 | Average | 0.759 |
| Stdv | 0.008 | Stdv | 0.014 | Stdv | 0.012 |
| Best | 0.767 | Best | 0.768 | Best | 0.775 |
BP | Average | 0.775 | Average | 0.770 | Average | 0.786 |
| Stdv | 0.022 | Stdv | 0.016 | Stdv | 0.025 |
| Best | 0.807 | Best | 0.792 | Best | 0.824 |