Table 3: Three-factor Box-Behnken design experiment with predicted response of dependent variable (flexural strength in Mpa).

RunsFactorsResponse
CodedActualFlexural strength in Mpa
X1X2X3X1X2X3

100015220355.58
2−1−1010200360.33
31−1020200356.6
4−10110220489.34
500015220355.58
600015220355.58
701−115240245.52
80−1−115200269.4
9−11010240365.42
1011020240342.03
11−10−110220279.43
120−1115200455.03
1310−120220265.38
1410120220479.66
1501115240457.7