Table 2.
ANOVA for response surface regression of sun protection factor (Y1), antioxidant activity (Y2), critical wavelength (Y3), UVA transmittance (Y4), UVB transmittance (Y5), and UVA/UVB ratio (Y6) c of the concentration of sunscreens filters (X1), concentration of extract (X2), and time of irradiation (X3).
| Source | Y1 | Y2 | Y3 | Y4 | Y5 | Y6 | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Df | SS | P | Df | SS | P | Df | SS | P | Df | SS | P | Df | SS | P | Df | SS | P | |
| Regression | 6 | 10.26 | 0.000 | 4 | 599.9 | 0.002 | 6 | 6150 | 0.000 | 6 | 11710 | 0.000 | 7 | 8358 | 0.000 | 3 | 0.756 | 0.000 |
| Linear | ||||||||||||||||||
| X1 | 1 | 0.89 | 0.000 | 1 | 36.7 | 0.021 | 1 | 3016 | 0.000 | 1 | 1645 | 0.000 | 1 | 1665 | 0.000 | 1 | 0.171 | 0.000 |
| X2 | 1 | 0.32 | 0.005 | 1 | 65.2 | 0.010 | 1 | 15 | 0.174 | 1 | 380 | 0.009 | 1 | 209 | 0.014 | 1 | 0.050 | 0.000 |
| X3 | 1 | 0.90 | 0.000 | 1 | 105 | 0.002 | 1 | 541 | 0.003 | 1 | 484 | 0.001 | ||||||
| Quadratic | ||||||||||||||||||
| X1 × X1 | 1 | 0.39 | 0.002 | 1 | 2146 | 0.000 | 1 | 753 | 0.001 | 1 | 942 | 0.000 | 1 | 0.085 | 0.000 | |||
| X2 × X2 | 1 | 0.07 | 0.133 | 1 | 28.2 | 0.030 | 1 | 183 | 0.057 | 1 | 127 | 0.048 | ||||||
| X3 × X3 | 1 | 0.17 | 0.029 | 1 | 103 | 0.144 | 1 | 82 | 0.106 | |||||||||
| Interaction | ||||||||||||||||||
| X1 × X2 | 1 | 8.2 | 0.128 | 1 | 39 | 0.035 | ||||||||||||
| X1 × X3 | ||||||||||||||||||
| X2 × X3 | 1 | 34 | 0.048 | 1 | 98 | 0.079 | ||||||||||||
| Error | 17 | 0.51 | 3 | 5.6 | 17 | 128 | 17 | 44 | 16 | 444 | 20 | 0.043 | ||||||
| Total | 23 | 10.77 | 7 | 605.5 | 23 | 6278 | 23 | 12456 | 23 | 8802 | 23 | 0.799 | ||||||