Clinical Chemistry Exam 1 Questions And Correct Answers 2024.
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Course
Clinical Chemistry
Institution
Clinical Chemistry
Accuracy - Answer The closeness with which a measurement comes to the true value
Precision - Answer The degree of reproducibility in the measurement of a substance
Mean - Answer Sum of all of a set divided by the number in the set (average)
Median - Answer The point on the scale th...
Clinical Chemistry Exam 1 Questions And Correct Answers 2024.
Accuracy - Answer The closeness with which a measurement comes to the true value
Precision - Answer The degree of reproducibility in the measurement of a substance
Mean - Answer Sum of all of a set divided by the number in the set (average)
Median - Answer The 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 - Answer The value in a set that occurs most frequently
Norm. Distribution - Answer The theoretical bell-shaped curve based in the Gaussian Law of Errors. Normal Frequency Curve
Standard Deviation - Answer A 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 - Answer An expression of the amount of error that can be allowed in the recovery of a value without affecting the validity
Coefficient of Variation - Answer An 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 - Answer A constant departure of quantity from the true value due to outside influence Random Error - Answer An error that does not occur in any regular predictable pattern
Systematic Error - Answer A regularly occurring error that is constant, predictable, and traceable
Shift - Answer Six to ten control values fall consecutively above or below the mean
Trend - Answer An uninterrupted rise or decline away from the mean
Primary Standard - Answer A solution generally containing a single purified solute in a pure solvent The true value of the solvent is known by exact measurement (Analytical Balance) Used to "set" or calibrate an instrument
Secondary Standard - Answer A material with an established value(s) determined by assay against a primary standard
It may contain one or more constituents
Control - Answer Usually pooled human sera containing a number of substances used to verify the precision of a method
Mole - Answer Atomic Weight
Molarity - Answer Atomic Weight/1 Liter (1000 mL)
Normality - Answer N = Eq/L (1000mL)
Equivalent Weight - Answer Equivalents = Molecular weight/Vē
Percent - Answer Parts per 100
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