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. 2022 May 20;12:8583. doi: 10.1038/s41598-022-12233-1

Table 3.

Analysis of variance (ANOVA) for the coefficients of the quadratic model of the biosorption of Cu2+ ions onto R. damascena.

Model term CE df SE F value p value
Prob > F
Intercept 57.24 1 1.96 – –
A-Biosorbent dose 10.54 1 2.08 25.63 0.0003
B-pH 5.13 1 2.08 6.06 0.03
C-initial Cu2+ conc.  − 4.82 1 2.08 5.36 0.039
A2 5.71 1 2.86 3.98 0.069

CE coefficient estimate, df degree of freedom, SE standard error.