Table 4: Levels of five different factors, applied in each of 16 trials, and the obtained results.

Trial numberFactor 1
A: Initial pH
Factor 2
B: Moisture content (mL)
Factor 3
C: Weight of grape fruit (%)
Factor 4
D: Weight of NaNO3 (%)
Factor 5
E: Weight of waste (g)
Response enzyme
activity (U/mL)

1144440.00
2243215.46
3212340.00
4423146.76
53312413.00
6111116.50
7122220.00
8342137.54
9324316.50
10441325.98
11221436.76
12313428.06
13133338.32
14234120.00
15414230.00
16432415.72

The numbers under factors refer to their levels; for description of levels, refer to Table 3.