Table 7: Estimated Effects for the Aromatic Hydrocarbons Yields

Factors Effects
X1: (TOS)  1.59
X2: (GHSV-C2) -10.83
X3: (XC1) -23.53
X4: (Temp.)  9.13
X1X2  -0.2
X1X3  -1.6
X1X4  -4.39
X2X3  -3.39
X2X4 -11.2
X3X4  -5.3