Table 2.
Results of the independent-sample t-test after the experiment.
| Experimental group | Control group | t | Sig 2-tailed | |||
|---|---|---|---|---|---|---|
| Mean | Std deviation | Mean | Std deviation | |||
| Forehand serve | 85.23 | 6.23 | 74.73 | 4.82 | 8.67 | <0.05 |
| Backhand serve | 86.85 | 7.16 | 73.23 | 5.31 | 12.28 | <0.05 |
| Long-range serve | 83.28 | 5.91 | 72.91 | 5.19 | 9.75 | <0.05 |
| Flat ball | 84.63 | 6.81 | 78.54 | 5.93 | 10.32 | <0.05 |
| Drop ball | 86.71 | 7.01 | 78.27 | 4.78 | 7.69 | <0.05 |
| Kill ball | 89.74 | 6.92 | 80.53 | 5.73 | 6.17 | <0.05 |
| Hook ball | 82.14 | 5.23 | 70.76 | 4.68 | 8.52 | <0.05 |
| Rub ball | 81.41 | 5.43 | 68.56 | 3.19 | 15.13 | <0.05 |
| Put small ball | 79.41 | 4.75 | 73.27 | 4.65 | 8.93 | <0.05 |
| Pick ball | 80.63 | 5.07 | 73.46 | 5.12 | 9.16 | <0.05 |