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Example sentences for: pmsd

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If toxicity is not found at the permitted RWC based upon the value of the effect concentration estimate (NOEC or LOEC) and the PMSD measured for the test exceeds the upper PMSD bound, then the test shall not be accepted, and a new test must be conducted promptly on a newly collected sample.
Lower PMSD bounds, which are based on the 10th percentiles of national PMSD data, are presented in Table 6. The 10th percentile PMSD represents a practical limit to the sensitivity of the test method because few laboratories are able to achieve such precision on a
The PMSD is the smallest percentage decrease in growth or reproduction from the control that could be determined as statistically significant in the test.
TABLE 6. VARIABILITY CRITERIA (UPPER AND LOWER PMSD BOUNDS) FOR SUBLETHAL HYPOTHESIS TESTING ENDPOINTS SUBMITTED UNDER NPDES PERMITS.
That is, when test data fail to meet assumptions of normality or heterogeneity of variance, a nonparametric method (determined following the statistical flowchart for the method) should be used to calculate test results, but the PMSD may be calculated as described above (using parametric methods) to provide a measure of test variability.