What does the CV calculated in Question 2 describe about the white cell counts?
a. Accuracy
b. Reliability
c. Proper calibration
d. Precision
ANS: D
The CV is a measure of precision or how well a result can be reproduced. It allows comparisons of assays with different means and is a unitless number, although usually expressed as a percentage. Accuracy is how close a result is to the true value; proper calibration is required to obtain accuracy. Reliability is how well a method holds both accuracy and precision over time.
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