The positive rate for urine tests indicating the presence of the synthetic opioid fentanyl was 1.13% in 2024. That is up from ...

The powerful, deadly opioid is increasingly present in the U.S. workforce, as reflected in data from national testing lab ...

Numerous shufflings of data produce a distribution of test-statistic values that can be used to assess the degree to which the test-statistic value produced by the actual data is unusual. Because this ...

Understand how a statistical test can be used to construct a confidence interval with a specified level of confidence. Randomization Test There is a good description and discussion of randomization or ...

To rule otherwise, the court concluded, would open the door to random drug tests for other extracurricular activities, and for the entire student body.

Quest reports a sharp rise in fentanyl use in U.S. workplace drug tests, raising concerns about safety, addiction and ...