32
Following the experimental design present in Table 4.3, empirical third order polynomial equations were developed for the three response variables, melting point, breaking load point and sensory test in term of three independent variables as shown in Equations (2), (3) and (4).
Y1 = 244.45 + 126.75A + 0.69B + 22.13C - 2.70A2 - 23.26B2 - 1.04C2 + 2.17AB + 6.67AC + 8.44BC
(2)
Y2 = 32.57 + 0.17A + 1.33B - 0.33C + 0.90A2 + 1.07B2 + 0.49C2 - 0.38AB - 0.54AC + 0.96BC
(3)
Y3 = 6.54 - 0.36A + 0.095B + 0.22C - 0.70A2 + 0.18B2 + 0.30C2 + 0.028AB + 0.020C + 0.022BC
(4)
Where Y1, Y2, and Y3 represent Breaking load test, Melting point test, and Sensory test, respectively. A, B and C are the coded values of beeswax (%), VCO (% )and hydrogenated palm oil (%).
The experimental data for Breaking load test, Melting point test, and Sensory test were statically analyzed by analysis of variance and the results are shown in Table 4.4 , Table 4.5 and Table 4.6.