Table 3.

Statistical analysis of average Jitter and average TET between the male and female groups aged from 31 to 50 years old for different water volumes.

(α = 0.05)		1 mL		3 mL		5 mL		10 mL		20 mL
		Jitter	TET	Jitter	TET	Jitter	TET	Jitter	TET	Jitter	TET
Male’s mean		0.616	1.023	0.691	1.073	0.754	1.139	0.789	1.221	N/A	N/A
Female’s mean		0.698	0.962	0.573	0.928	0.686	1.076	0.746	1.137	0.883	1.215
95% CI *	Upper	0.698	1.032	0.679	1.088	0.764	1.201	0.805	1.277	0.914	1.237
	Lower	0.573	0.905	0.550	0.921	0.682	1.054	0.701	1.042	0.852	1.074
Degree of freedom (df)		18	18	14	14	19	19	17	17	19	19
F-value		2.101	2.101	2.145	2.145	2.093	2.093	2.110	2.110	2.093	2.093
T-value **		−1.763	0.947	5.147	1.481	2.424	1.800	0.533	0.304	N/A	N/A
p-value		0.095	0.356	0.001	0.156	0.025	0.088	0.601	0.765	N/A	N/A
Cohen’s d (Effect size)		−0.788	0.424	2.658	0.662	1.069	0.794	0.245	0.139	N/A	N/A

* CI = Confidence Interval; ** The bold number means that T-value > F-value.