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qualitycontrol-289
BIAS IN QC CHARTS — The text defines BIAS specifically for QC chart interpretation. What is the definition of BIAS as given in the text?
A. Bias is the width of the normal distribution curve for control values
B. BIAS IS A MEASURE OF DEGREE OF TRUENESS — it is a measure of systematic error; refers to a consistent offset of control values from the mean line (Figure 6.14)
C. Bias refers to random variation around the mean
D. Bias is the difference between the highest and lowest control values
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