TABLE 4.

Bonferroni test between the variable duration of plays and number of DMUs.

Duration of plays × Number of DMUs	Difference of means	Standard error	p	d
U-10–U-12	−2.296*	0.739	0.006	−0.421
U-10–U-14	1.981*	0.807	0.044	−0.355
U-10–U-12	−0.561*	0.185	0.008	−0.450
U-10–U-14	−0.679*	0.203	0.003	−0.458

d, effect size. DMUs, decision-making units.