Table 1.
The levels of the variables in this study.
Table 2.
The design of 20 random tests.
Fig 1.
Effects of different solvents on extraction efficiency of carotenoids.
Two items with same letter have no significant difference. Two items with different letter have significant difference.
Table 3.
Results of extraction efficiency of carotenoid.
Fig 2.
Statistical analysis of the model.
(a) Comparison of actual and predicted response values. (b) Comparison of internally studentized residuals and predicted response values.
Table 4.
Analysis of variance for model.
Fig 3.
Response using CCD obtained by plotting: (a) time vs. temperature; (b) time vs. volume; (c) temperature vs. volume.