. 2023 Jan 5;28(2):546. doi: 10.3390/molecules28020546

Table 4.

Analysis of the experiments findings—the initial assessment of the effects by Statistica 13.

Parameter	Evaluation of Effects, Zn, mg/L, R² = 0.9421, R²_adj = 0.8552, 3 Parameter, 1 Block, 16 Experiments, MS = 0.0336
Parameter	Effect	Standard Error	p-Value *	−95% Confidence Interval	+95% Confidence Interval	Factor	Standard Error of Factor	Lower Confidence Interval	Upper Confidence Interval
Constant value	3.396	0.129	0.0222	0.079	0.712	0.396	0.129	0.079	0.712
pH (L) **	−0.800	0.099	0.0002	−1.043	−0.557	−0.400	0.050	−0.521	−0.279
pH (Q) ***	0.549	0.121	0.0039	0.254	0.844	−0.274	0.060	0.127	0.422
V Na₂CS₃ (L)	−0.242	0.099	0.0507	−0.485	0.001	−0.121	0.050	−0.242	0.001
V Na₂CS₃ (Q)	0.075	0.121	0.5555	−0.220	0.370	0.038	0.060	−0.110	0.185
Time (L)	−0.036	0.099	0.7316	−0.279	0.207	−0.018	0.050	−0.139	0.104
Time (Q)	0.068	0.121	0.5923	−0.227	0.363	0.034	0.060	−0.113	0.182
**** pH (L) relative to V Na₂CS₃ (L)	0.208	0.130	0.1608	−0.110	0.525	0.104	0.065	−0.055	0.262
**** pH (L) relative to Time (L)	0.008	0.130	0.9558	−0.310	0.325	0.004	0.065	−0.155	0.162
**** V Na₂CS₃ (L) relative to Time (L)	−0.007	0.130	0.9558	−0.325	0.310	−0.004	0.065	−0.162	0.155

* statistically significant if p < 0.05, ** L—linear effect, *** Q—quadratic effect, **** (L) relative to (L)—linear combination of the independent parameters.