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Tests of seasonality in arthropod-related mortality in Iran (2016–2023)
| Test | Statistic | df | p |
|---|---|---|---|
| Chi-square goodness-of-fit (12 Jalali months) | 155.36 | 11 | <0.001 |
| Chi-square goodness-of-fit (4 seasons) | 117.23 | 3 | <0.001 |
| Kruskal–Wallis (annual counts by season) | 22.56 | 3 | <0.001 |
| Rayleigh test of circular uniformity | 77.89 | – | <0.001 |
| Likelihood-ratio test for harmonic terms | 177.47 | 4 | <0.001 |
