| Verification of data normality | Shapiro-Wilk test, Jaque-Bera test, Kolmogorov-Smirnov test and D’Agostino test | |
| Normality and tests | Normal (parametric test) | Not Normal (non-parametric test) |
| Comparison of means | Student’s test (95% and 99% confidence levels) | Mann Whitney-Wilcoxon test (95% and 99% confidence levels) |
| Correlation | Pearson correlation (95% and 99% confidence levels) | Kendall or Spearman correlation (95% and 99% confidence levels) |