Table 3 Regression coefficients of second order polynomial model for optimization of silver nanoparticles biosynthesis by phycoerythrin pigment.
Factor | Coefficient estimate | df | Standard error | 95% CI Low | 95% CI High |
|---|---|---|---|---|---|
Intercept | 1660.87 | 1 | 34.31 | 1587.75 | 1733.99 |
X1 | 120.44 | 1 | 26.03 | 64.96 | 175.93 |
X2 | 78.04 | 1 | 26.03 | 22.56 | 133.52 |
X3 | −2.40 | 1 | 26.03 | −57.89 | 53.08 |
X4 | −6.42 | 1 | 26.03 | −61.90 | 49.06 |
X1 X2 | 78.92 | 1 | 27.61 | 20.07 | 137.76 |
X1 X3 | −18.74 | 1 | 27.61 | −77.58 | 40.11 |
X1 X4 | 10.59 | 1 | 27.61 | −48.26 | 69.44 |
X2 X3 | −6.64 | 1 | 27.61 | −65.48 | 52.21 |
X2 X4 | −47.68 | 1 | 27.61 | −106.53 | 11.16 |
X3 X4 | −69.43 | 1 | 27.61 | −128.28 | −10.58 |
X12 | −644.90 | 1 | 68.61 | −791.14 | −498.66 |
X22 | −936.48 | 1 | 68.61 | −1082.72 | −790.24 |
X32 | 105.59 | 1 | 68.61 | −40.65 | 251.83 |
X42 | 18.26 | 1 | 68.61 | −127.98 | 164.50 |
