Table 5.

Parameter estimates and statistics for quadratic regressions predicting performance error for SD 15

					95% Confidence Interval
	β	SE	t(24)	P	Lower bound	Upper bound
ν	−0.041	0.124	−0.330	0.744	−0.298	0.216
η	0.022	0.195	0.111	0.913	−0.381	0.424
α1	0.084	0.201	0.416	0.681	−0.331	0.499
ν2	0.419	0.153	2.748	0.011	0.104	0.734
η2	0.451	0.142	3.182	0.004	0.158	0.743
${\alpha }_1^2$	0.197	0.151	1.307	0.204	−0.114	0.509
Intercept	−1.033	0.268	−3.857	0.001	−1.586	−0.480

Fitted model: F(6,24) = 8.121, P = 0.000, R² adjusted = 0.587.