Table 2.

Summary of various factor effects and their p values for responses Y₁ and Y₂

Factor	Y1		Y2
	Coefficient	p value	Coefficient	p value
Intercept	276.79	Model 0.0013	82.08	0.0014
X1	124.75	0.0005	2.12	0.1622
X2	− 23.97	0.2784	2.50	0.1118
X1X2	− 3.55	0.8910	7.13	0.0038
X12	141.27	0.0022	− 11.72	0.0007
X22	48.12	0.1535	− 2.67	0.2289