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Critical values for Cochran test statistics.
| Pairs | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 95% | 0.727 | 0.68 | 0.638 | 0.602 | 0.57 | 0.541 | 0.515 | 0.492 | 0.471 | 0.452 | 0.434 | 0.418 | 0.403 | 0.389 |
The calculated Cochran test statistic for pH, available iodine and absorbance of 0.5%, 0.6% and 1.0% PVP-I solutions at storage conditions i.e. 25 °C (60%RH), 30 °C (65%RH) and 40 °C (75%RH) is tabulated in Table 3.
