Variable | Low level | High level | Main effect | Β-coefficient | P-value | t-value | % confidence |
---|---|---|---|---|---|---|---|
-1 | +1 | ||||||
Orange peel waste (% w/v) | 0.5 | 2.0 | 0.513 | 0.2565 | 0.020839* | 2.796274 | 97.92 |
NaNO3 (% w/v) | 0.1 | 0.4 | -0.083 | -0.0415 | 0.661675 | -0.45242 | 33.84 |
MgSO4 (% w/v) | 0.1 | 0.4 | 0.261 | 0.1305 | 0.188555 | 1.422666 | 81.15 |
CaCl2 (% w/v) | 0.1 | 0.4 | 0.255 | 0.1275 | 0.197956 | 1.389961 | 80.21 |
FeSO4 (% w/v) | 0.1 | 0.4 | 0.179 | 0.0895 | 0.354709 | 0.975698 | 63.53 |
KNO3 (% w/v) | 0.1 | 0.4 | 0.037 | 0.0185 | 0.844651 | 0.201681 | 15.45 |
pH | 6.0 | 9.0 | 1.501 | 0.7505 | 1.85E-05* | 8.181689 | 99.99 |
Inoculum size (% v/v) | 1.0 | 5.0 | 0.215 | 0.1075 | 0.271314 | 1.171928 | 72.87 |
Incubation temperature°C | 37.0 | 50.0 | -0.811 | -0.4055 | 0.00167* | -4.42062 | 99.83 |
Incubation time (hrs) | 24.0 | 60.0 | -0.245 | -0.1225 | 0.214517 | -1.33545 | 78.55 |