Table 4.

Parameter estimates and statistics for quadratic regressions predicting performance error for SD 10

					95% Confidence Interval
	β	SE	t(24)	P	Lower bound	Upper bound
ν	0.142	0.114	1.254	0.222	−0.092	0.377
η	−0.058	0.178	−0.327	0.746	−0.426	0.309
α1	0.213	0.184	1.160	0.257	−0.166	0.592
ν2	0.372	0.139	2.667	0.013	0.084	0.659
η2	0.605	0.129	4.675	0.000	0.338	0.871
${\alpha }_1^2$	−0.081	0.138	−0.588	0.562	−0.366	0.203
Intercept	−0.866	0.245	−3.542	0.002	−1.371	−0.362

Fitted model: F(6,24) = 10.545, P = 0.000, R² adjusted = 0.656.