Table 2 Nonparametric two-independent-sample rank sum test results of MIPS data in the experimental group at 1 and 2 h and that at initial time
| Time | Sample | Mann–Whitney U | Wilcoxon W | Z | Asymp. Sig. (two-tailed) |
|---|---|---|---|---|---|
| 1 h | Experiment | 40.000 | 95.000 | − 0.808 | 0.419 |
| 2 h | Experiment | 20.000 | 75.000 | − 2.423 | 0.015 |