Trials

X1 (˚C)

X2 (h)

Y (response)

58.66

68.78

19.96

Factorial trials

76.34

68.78

23.22

58.66

111.22

20.42

76.34

111.22

33.4

55.00

90.00

18.82

Star trials

80.00

90.00

31.42

67.50

60.00

18.82

67.50

120.00

26.42

67.50

90.00

23.82

67.50

90.00

21.42

Center trials

67.50

90.00

22.88

67.50

90.00

21.42

67.50

90.00

22.42