| Variables | LIpv | LTm | LPrec | LPib |
| Mean | 4.28 | 3.41 | 4.82 | 22.98 |
| Maximum | 4.69 | 3.45 | 5.00 | 23.40 |
| Minimum | 3.80 | 3.38 | 2.78 | 22.59 |
| Standard deviation | 0.29 | 0.019 | 0.38 | 0.29 |
| Observations | 31 | 31 | 31 | 31 |
| Normality tests Shapiro Wilk W test |
0.91** |
0.93* |
0.28*** |
0.87*** |
| Doornik-Hansen test | Chi(2) = 358.86*** |
| ||