A patient's white blood cells (WBCs) are counted on an automated cell counter 10 times. The mean white count is 8000/mL, and the standard deviation (SD) is 300. What is the coefficient of variation (CV)?
a. 0.04%
b. 2.6%
c. 3.8%
d. 26%
ANS: C
% CV = (SD/mean) ´ 100 = (300/8000) ´ 100 = 3.8%
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