Table 4.
Statistical mean differences in acceleration (G) between the sub-groups offensive (O) vs. defensive (D) and semi-professional (SP) vs. recreational (R).
| Parameter | Subgroup | N | M ± SD | CI | F | df | p | d |
|---|---|---|---|---|---|---|---|---|
| Stand headers | O | 25 | 5.9 ± 1.0 | 5.53–6.36 | 1.77 | 63 | 0.189 | 0.4 |
| D | 39 | 6.3 ± 1.0 | 5.96–6.62 | |||||
| Jump headers | O | 25 | 5.6 ± 1.1 | 5.17–6.11 | 0.04 | 62 | 0.848 | 0.1 |
| D | 38 | 5.7 ± 1.1 | 5.35–6.04 | |||||
| Run headers 1 | O | 24 | 7.4 ± 1.0 | 6.98–7.81 | 0.00 | 35.2 | 0.991 | 0.0 |
| D | 33 | 7.4 ± 0.6 | 7.18–7.61 | |||||
| Stand headers | SP | 39 | 6.3 ± 1.0 | 5.99–6.62 | 2.83 | 51 | 0.099 | −0.4 |
| R | 13 | 5.8 ± 1.2 | 5.06–6.45 | |||||
| Jump headers | SP | 38 | 5.8 ± 1.1 | 5.44–6.16 | 1.62 | 50 | 0.209 | −0.4 |
| R | 13 | 5.4 ± 1.1 | 4.71–5.99 | |||||
| Run headers | SP | 37 | 7.6 ± 0.9 | 7.27–7.84 | 1.21 | 48 | 0.277 | −0.4 |
| R | 12 | 7.2 ± 1.1 | 6.49–7.94 |
1 The sub-group classification led to a variance inhomogeneity so that the Welch test was conducted.