Quality Control Runs on a PCO₂ Electrode Have Produced a Mean

Multiple Choice

Quality control runs on a PCO₂ electrode have produced a mean of 40 mm Hg ± 2 mm Hg (1 SD) .What are the chances of obtaining a value of 45 mm Hg on a control run if the electrode is functioning properly?

A) 95%
B) 50%
C) 5%
D) Less than 1%