Determination of Optimum Conditions for the Production of Activated Carbon Derived from Separate Varieties of Coconut Shells

Table 11

Statistical analysis of model.

Item measured	Optimization (dwarf) Figure 4(b)(i)	Optimization (tall) Figure 4(b)(ii)	Optimization (dwarf) Figure 4(c)(i)	Optimization (tall) Figure 4(c)(ii)
Standard error	2.735	6.796	14.334	5.7687
95% confidence interval	8.704	21.625	45.611	18.356
99% confidence interval	15.98	39.696	83.725	33.695
Standard deviation	5.471	13.592	28.668	11.537
Coefficient of variation	0.371	0.5146	0.5148	0.371
Correlation with experiment	0.994	0.9559	0.9559	0.9936