Table 3.
χ 2 tests for correlations between chamber number and the logarithm of test diameter (in µm) at the 17 sampling sites and for normal distribution of chamber number and the logarithm of test diameter
| Date | n | Correlation | Chamber number | Test diameter | |||
|---|---|---|---|---|---|---|---|
| R 2 | p(H0) | χ 2 | p(H0) | χ 2 | p(H0) | ||
| 23.04.2014 | 24 | 0.7874 | 3.75E−09 | 11.13 | 4.21E−02 | 23.85 | 4.90E−04 |
| 02.05.2014 | 28 | 0.8601 | 6.56E−13 | 9.28 | 6.74E−02 | 7.30 | 9.95E−02 |
| 09.05.2014 | 12 | 0.8080 | 3.50E−05 | ||||
| 30.05.2014 | 2 | ||||||
| 18.07.2014 | 31 | 0.7705 | 4.46E−11 | 8.84 | 7.44E−02 | 7.60 | 9.48E−02 |
| 19.08.2014 | 2 | ||||||
| 10.09.2014 | 13 | 0.8816 | 9.92E−07 | 11.99 | 3.29E−02 | 32.76 | 1.26E−05 |
| 03.10.2014 | 30 | 0.7446 | 4.31E−10 | 27.94 | 9.39E−05 | 27.01 | 1.37E−04 |
| 10.11.2014 | 8 | 0.8946 | 1.91E−04 | 11.88 | 3.40E−02 | 32.70 | 1.29E−05 |
| 11.12.2014 | 12 | 0.9906 | 9.11E−12 | 22.57 | 8.08E−04 | 20.11 | 2.08E−03 |
| 16.01.2015 | 17 | 0.8523 | 6.42E−08 | 38.02 | 1.32E−06 | 67.27 | 2.44E−12 |
| 13.02.2015 | 7 | 0.6287 | 1.67E−02 | 0.26 | 7.72E−04 | ||
| 04.03.2015 | 31 | 0.9033 | 1.50E−16 | 21.21 | 1.37E−03 | 106.51 | 2.32E−20 |
| 15.04.2015 | 8 | 0.7048 | 4.56E−03 | 26.24 | 1.88E−04 | 25.41 | 2.63E−04 |
| 18.05.2015 | 12 | 0.8206 | 2.48E−05 | 121.94 | 1.45E−23 | 30.69 | 3.01E−05 |
| 11.06.2015 | 8 | 0.8803 | 2.81E−04 | 42.28 | 2.04E−07 | 19.73 | 2.39E−03 |
| 14.07.2015 | 4 | 0.7538 | 6.59E−02 | 30.51 | 3.25E−05 | 1.26 | 2.54E−02 |
Note the difficulty/impossibility of checking significance in samples with n < 4 specimens even though high correlation is present (sample from 14 July 2015)