JSSM-2011, Vol.10, Issue 3, 534

Table 2. Statistical analysis of the effect of opposition and level of competition on ball velocity in elite, amateur and under 18 handball players.

	Effect of opposition			Effect of level of competition			Interaction degree of opposition x level of competition
Parameter	p	η²	Statistical Power	p	η²	Statistical Power	p	η²	Statistical Power
Ball velocity	<.001	.556	1.000	<.001	.490	1.000	.178	.027	.487

Effect is based on the ANOVA’s main effect of opposition, level of competition and effect between groups on degree of opposition x level of competition interaction.