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qualitycontrol-271
IMPORTANCE OF DETERMINING CV — The text explains WHY comparing standard deviations alone between two methods can be misleading. What is the TEXT'S REASONING for using CV instead of SD for comparison?
A. CV is easier to calculate than SD
B. FREQUENTLY IT IS NECESSARY TO COMPARE THE RELATIVE VARIABILITY BETWEEN VARIOUS SETS OF DATA AND METHODS; WHEN TWO GROUPS MAY BE OF DIFFERENT MAGNITUDE OR DIFFERENT UNITS, THE SD ALONE CANNOT BE COMPARED — CV expresses SD as a percent of the mean, allowing meaningful comparison
C. CV removes the need to calculate SD at all
D. CV is required by CLIA regulations for all methods
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