From the late 1970s to the early 1990s, the EP test
was widely used throughout the US to screen children for Pb exposure.
In summary, the EP test
statistic for univariate normality is quite easy to apply and yields good power against the alternative skew-exponential-power distributions examined in this paper.
The percentage of a given metal present in a waste released in the EP test
ranged from 0 (not detectable) to 39% for cadmium, 1-12% for lead and 0-0.
The Micro EP test
stages are said to provide this capability in an affordable, easy-to-use package.
The positive and negative predictive values of a MTWA-directed strategy and that of an EP test
alone were essentially identical," said Costantini.