| Period | N | Mini | Maxi | Mean | Std. error Mean | Std. Deviation | Variance |
NIM | Pre | 6 | 6.6 | 9.4 | 7.883 | 0.4629 | 1.1339 | 1.286 |
Post | 6 | 8.0 | 9.8 | 9.300 | 0.2757 | 0.6753 | 0.456 |