Table 6.
Calculation worksheet of the effects of the three-variable system and magnitude of effects and error limits of Set III.
| Experimental Conditions | Calculation of Effects |
|---|---|
| Temperature | −0.1063 |
| Time | −0.1063 |
| Ethanol concentration | 0.0238 |
| Temperature × time | −0.0413 |
| Temperature × ethanol concentration | −0.0163 |
| Time × ethanol concentration | −0.0213 |
| Temperature × time × ethanol concentration | 0.0088 |
| Change in mean effect | 0.2675 |
| Standard deviation (σ) | 0.1140 |
| Error limits: | |
| for average | 0.1612 |
| for effects | 0.1145 |
| for change in mean | 0.1016 |
R1: (largest difference − smallest difference) in block 1; R2: (largest difference − smallest difference) in block 2; fk,n = constant depending on number of replications (n) and number of experiments (k) per cycle = 0.3 for n = 2 and k = 5.