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Test bank For Clinical Chemistry Exam 1 (9th Edition by Bishop Fody Questions & Answers with rationales)
Test bank For Clinical Chemistry Exam 1 (9th Edition by Bishop Fody Questions & Answers with rationales)
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Test bank For Clinical Chemistry Exam1 (9th Edition by Bishop Fody Questions
& Answers with rationales)
Accuracy - ANSThe closeness with which a measurement comes to the true value
Precision - ANSThe degree of reproducibility in the measurement of a substance
Mean - ANSSum of all of a set divided by the number in the set (average)
Median - ANSThe point on the scale that has equal number of observations above and below
(even number, take the two-center numbers add and divide by 2)
Mode - ANSThe value in a set that occurs most frequently
Norm. Distribution - ANSThe theoretical bell-shaped curve based in the Gaussian Law of Errors.
Normal Frequency Curve
Standard Deviation - ANSA statistical calculation that measures the scatter of sample values
around the mean. (The acceptable variation from the mean) The clinical lab uses 2 SD as an
acceptable variation in a method of analysis.
Confidence Limits - ANSAn expression of the amount of error that can be allowed in the
recovery of a value without affecting the validity
Coefficient of Variation - ANSAn expression of standard deviation as a percentage of the mean
A way of comparing the precision of different methods of assay
Also a better way to check the precision at various levels of concentration
Bias - ANSA constant departure of quantity from the true value due to outside influence
Random Error - ANSAn error that does not occur in any regular predictable pattern
Systematic Error - ANSA regularly occurring error that is constant, predictable, and traceable
Shift - ANSSix to ten control values fall consecutively above or below the mean
Trend - ANSAn uninterrupted rise or decline away from the mean
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