In cases of variance heterogeneity, the Welch-test was used instead of the t-test.
In case of disagreement (score variance > 1), the slides were re-examined and an agreement was reached by the observers.
To determine whether or not there were significant differences between two given groups among three, we performed the Steel-Dwass test in case of unequal variance, and the Tukey-Kramer test in case of equal variance using the statistical software JMP Pro 11.0 (SAS Institute, Cary, NC, USA).
Moreover, the Bayesian control charting structures with conjugate priors provide better performance for monitoring the Y-intercepts and slopes than the one of non-conjugate priors, while both priors perform almost equivalently in case of errors variance.
They have found that the Bayesian control with conjugate prior charts gives a high performance in monitoring the Y-intercepts and slopes than the one with non-conjugate priors, while both priors perform almost equivalently in case of error variance.
In case of equal variance ANOVA followed by Bonferroni or TukeyHSD corrected pairwise comparison was chosen.
In this study we compare age groups based upon BMD in case of unequal variance being present among the groups.
In case of unequal variance Welch corrected ANOVA was applied, followed by Games Howell test of all samples or pairwise comparison of samples with equal variance.
For comparing the cost assessment between the two groups, a Student t test will be used, or a Welsh version of the test in case of differing variance.
Paired comparisons were performed by Student's t-tests or by Mann–Whitney rank sum tests in case of unequal variance or failed normality test.
