Table 3. Three-Factor Box–Behnken Experimental Design for the 3 mm Fiber.
| run no. | cutting size (mm) (A) | fiber (wt %) (B) | CMC (wt %) (C) |
|---|---|---|---|
| 1 | 1 | –1 | 0 |
| 2 | 0 | 1 | –1 |
| 3 | –1 | 0 | –1 |
| 4 | 1 | 0 | –1 |
| 5 | 1 | 0 | –1 |
| 6 | –1 | –1 | 0 |
| 7 | –1 | 0 | –1 |
| 8 | –1 | 1 | 0 |
| 9 | 0 | 1 | 1 |
| 10 | 0 | 0 | 0 |
| 11 | 1 | 1 | 0 |
| 12 | 0 | 0 | 0 |
| 13 | –1 | –1 | 0 |
| 14 | 0 | 0 | 0 |
| 15 | 1 | 0 | 1 |
| 16 | 0 | 0 | 0 |
| 17 | 1 | –1 | 0 |
| 18 | 0 | –1 | 1 |
| 19 | 0 | –1 | –1 |
| 20 | 0 | 1 | 1 |
| 21 | –1 | 0 | 1 |
| 22 | 0 | 0 | 0 |
| 23 | 0 | 0 | 0 |
| 24 | 0 | 0 | 0 |
| 25 | –1 | –1 | 0 |
| 26 | 0 | 1 | –1 |
| 27 | –1 | 0 | 1 |
| 28 | 1 | 1 | 0 |
| 29 | 0 | –1 | 1 |
| 30 | –1 | 1 | 0 |
| 31 | 1 | 0 | 1 |
| 32 | 0 | –1 | –1 |
| 33 | 0 | –1 | –1 |
| 34 | 1 | 1 | 0 |
| 35 | 1 | –1 | 0 |
| 36 | –1 | 1 | 0 |
| 37 | 0 | 1 | 1 |
| 38 | 0 | –1 | 1 |
| 39 | 1 | 0 | 1 |
| 40 | 0 | 0 | 0 |
| 41 | 0 | 0 | 0 |
| 42 | –1 | 0 | 1 |
| 43 | 0 | 1 | –1 |
| 44 | 1 | 0 | –1 |
| 45 | –1 | 0 | –1 |