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Study planning matrix.
| No | Coded Variables | Natural Variables | ||
|---|---|---|---|---|
| X1 | X2 | Coal (C), kg | Quartzite (Q), kg | |
| 1 | 1 | 1 | 94.18 | 34.51 |
| 2 | − 1 | 1 | 65.82 | 34.51 |
| 3 | 1 | − 1 | 94.18 | 25.13 |
| 4 | − 1 | − 1 | 65.82 | 25.13 |
| 5 | 1.41 | 0 | 100 | 29.82 |
| 6 | − 1.41 | 0 | 60 | 29.82 |
| 7 | 0 | 1.41 | 80 | 36.4 |
| 8 | 0 | − 1.41 | 80 | 23.2 |
| 9–13 | 0 | 0 | 80 | 29.82 |
