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Corrigendum
doi:
10.1016/j.arabjc.2023.104713
Corrigendum to “The optimization of silica gel synthesis from chemical bottle waste using response surface” [Arab. J. Chem. 15(12) (2022) 104329]
Chemistry Department, Faculty of Sciences and Analytica Data, Institut Teknologi Sepuluh Nopember, Surabaya 60111, Indonesia
⁎Corresponding author. yatimnikmah@gmail.com (Yatim Lailun Ni'mah)
© The Author(s) 2023
Disclaimer:
This article was originally published by Elsevier and was migrated to Scientific Scholar after the change of Publisher.
This article was originally published by Elsevier and was migrated to Scientific Scholar after the change of Publisher.
The authors regret,
Table 3. Statistical regression analysis.
| Dep. Variable: | Removal | R-squared: | 0.938 |
| Model: | OLS | Adj. R-squared: | 0.826 |
| Method: | Least Squares | F-statistic: | 8.360 |
| Date: | Fri, 14 Oct 2022 | Prob (F-statistic): | 0.0154 |
| Time: | 09:26:56 | Log-Likelihood: | −37.841 |
| No. Observations: | 15 | AIC: | 95.68 |
| Df Residuals: | 5 | BIC: | 102.8 |
| Df Model: | 9 | ||
| Covariance Type: | nonrobust |
| coef | std err | t | P > |t| | [0.025 | 0.975] | |
|---|---|---|---|---|---|---|
| const | 404.9521 | 144.367 | 2.805 | 0.038 | 33.844 | 776.060 |
| x1 | −228.0573 | 455.275 | −0.501 | 0.638 | −1398.380 | 942.265 |
| x2 | −6.3722 | 3.646 | −1.748 | 0.141 | −15.745 | 3.001 |
| x3 | −0.5619 | 0.125 | −4.513 | 0.006 | −0.882 | −0.242 |
| x4 | −268.6939 | 687.851 | −0.391 | 0.712 | −2036.872 | 1499.484 |
| x5 | 6.7784 | 4.061 | 1.669 | 0.156 | −3.661 | 17.218 |
| x6 | −0.0431 | 0.198 | −0.218 | 0.836 | −0.553 | 0.467 |
| x7 | 0.0400 | 0.029 | 1.389 | 0.224 | −0.034 | 0.114 |
| x8 | 0.0009 | 0.001 | 0.648 | 0.545 | −0.003 | 0.004 |
| x9 | 0.0005 | 6.8e−05 | 6.825 | 0.001 | 0.000 | 0.001 |
| Omnibus: | 0.344 | Durbin-Watson: | 2.529 |
| Prob(Omnibus): | 0.842 | Jarque-Bera (JB): | 0.484 |
| Skew: | 0.191 | Prob(JB): | 0.785 |
| Kurtosis: | 2.208 | Cond. No. | 2.48e+08 |