Kendall's tau-b correlations and descriptive statistics
| Citation contamination | Journal Impact Factors 2019 | Journal age | Number of issues per volume | |
|---|---|---|---|---|
| Citation contamination | 1.000 | |||
| Journal Impact Factors 2019 | −0.098 | 1.000 | ||
| Journal age | −0.003 | 0.239* | 1.000 | |
| Number of issues per volume | 0.290** | 0.016 | 0.277** | 1.000 |
| Descriptive statistics | ||||
| Mean | 8.900 | 2.963 | 34.120 | 5. 430 |
| Median | 5.500 | 2.487 | 30.500 | 4.000 |
| Minimum–maximum | 0–40 | 0.543–7.959 | 10–96 | 1–18 |
| Skewness | 1.437 | 1.122 | 1.670 | 2.459 |
| Kurtosis | 1.814 | 0.987 | 4.549 | 8.649 |
| Quartiles (1st Q; 3rd Q) | 2; 13.75 | 1.779; 3.759 | 25;39 | 4; 6 |
| Citation contamination | Journal Impact Factors 2019 | Journal age | Number of issues per volume | |
|---|---|---|---|---|
| Citation contamination | 1.000 | |||
| Journal Impact Factors 2019 | −0.098 | 1.000 | ||
| Journal age | −0.003 | 1.000 | ||
| Number of issues per volume | 0.016 | 1.000 | ||
| Mean | 8.900 | 2.963 | 34.120 | 5. 430 |
| Median | 5.500 | 2.487 | 30.500 | 4.000 |
| Minimum–maximum | 0–40 | 0.543–7.959 | 10–96 | 1–18 |
| Skewness | 1.437 | 1.122 | 1.670 | 2.459 |
| Kurtosis | 1.814 | 0.987 | 4.549 | 8.649 |
| Quartiles (1st | 2; 13.75 | 1.779; 3.759 | 25;39 | 4; 6 |
Note(s): *p < 0.05, **p < 0.01