Analytical Validation of Smartphone Spectroscopic Technic Used in an Educational Kinetic Study

Table 2

Test of homogeneity of variance of iodine solution during 4 days.

Day (i)	Aij
1	0.255	0.230	0.238	0.163	=0.619
2	0.255	0.252	0.219	0.399	=0.399
3	0.250	0.241	0.244	0.020
4	0.246	0.251	0.239	0.036	0.645
CCri (α = 1%) = 0.864			CCri (α = 5%) = 0.768
Decision
If CCal < CCri (α = 1%)			Group does not contain suspected measurements
If CCal < CCri (α = 5%)			Group does not contain rejectable measurements
Conclusion
All the values are not suspected

S_j = standard deviation of data series J.