The Effect of Novel Binary Accelerator System on Properties of Vulcanized Natural Rubber

Table 6

Double-Factors experiment plan (2²), typical data.

	B	Observations	Totals	Averages	Estimation	Residue
1	1	Y 1,1,1 Y 1,1,2… Y 1,1,n	Y 1.	𝑌1	Y 1.e	𝑌1−𝑌1.𝑒
2	2	Y 2,2,1 Y 2,2,2… Y 2,2,n	Y 2.	𝑌2	Y 2.e	𝑌2−𝑌1.𝑒
⋯	…	…… … …	…	…	…	…
a	b	Ya ,b,1 Ya ,b,2… Ya,b,n	Ya,b.	𝑌𝑎,𝑏	Ya,b,e	𝑌𝑎,𝑏−𝑌𝑎,𝑏,𝑒

𝑎: number of different levels of factor 𝐴;
𝑏: numberofdifferentlevelsoffactor 𝐵;
𝑛: numberofobservations;
𝑌_1.=𝑌_1,1,1+𝑌_1,1,2+⋯+𝑌_1,1,𝑛;
𝑌₁=𝑌_1./𝑛𝐼=(𝑌₁+𝑌₂+⋯+𝑌_𝑎,𝑏.)/𝑎.