The threshold for a positive reading was set based on readings directly compared to pathology results.
'False Positive' Readings Indeed, Mr. Campbell acknowledged that there was a "false positive" reading at the ocean beach in Harvey Cedars, and he said that the E.P.A. was expected to issue new testing guidelines shortly.
It was the first positive reading since November.
A positive reading shows that optimists outnumber pessimists.
"Pass a Geiger counter over it, and you get a positive reading.
But why had the fire investigators obtained a positive reading only in that location?
Ms Tilley was breath tested by the police and did not return positive reading.
The current case is being investigated after a patient returned a positive reading in a preliminary urine test.
A positive reading on the labor market would give the Fed an additional reason to increase rates.
Under the revised procedures, turbans will not be searched unless there is a positive reading on a metal detector.
