Statistically derived limits for internal quality control of blood gas samples are usually set at what appropriate level?
A) 1 standard deviation from the mean
B) 2 standard deviations from the mean
C) 3 standard deviations from the mean
D) 5 standard deviations from the mean

Question

Quizplus · Accepted Answer

In one common approach, the results of control media analyses are plotted on a graph and compared with statistically derived limits, usually ±2 standard deviation (SD) ranges (see Figure 19-9).

Statistically Derived Limits for Internal Quality Control of Blood Gas