Heterogeneity of the variances was assessed by Cochran's test with no significant differences among variances.
31 Total SNK 1000 > 385 ppm Fa 20: 385 > Fa 30, 59: 1000 1000 ppm > 385 ppm 1000 ppm: Fa 30 1000: Fa 30 > > 1, 17, 20, 39, 47 20, 39, 47 C = Cochran's test = nonsignificant.
Using Cochran's test
, the homoscedasticity of variances is compared; that is, it is possible to assess whether the variance of the obtained results by a group is excessive compared to the other groups; it is a one-sided test.
of maximum variance identified 1 analytical outlier.
Finally, the disagreements in classification among different analytic procedures are tested for significance using Cochran's test
for categorical outcomes and a rank based nonparametric analysis of variance for dependent sample design.