QUALITY CONTROL (EXAM 1) QUESTIONS AND
ANSWERS
__________________ describes how close a test result is to the true value. - Answers -
Accuracy
__________________ describes how close the test results are to one another when
*repeated analyses* of the same material are performed. - Answers - Precision
______________________ is a process that monitors the accuracy and reproducibility
of results through the use of control specimens. - Answers - Quality control
________________________________ have an EXACT known concentration, purity,
or quality of the substance (analyte) being measured, used to standardize the assay
sometimes called ___________________ (NOT A CONTROL) - Answers - Standards
(Calibrators)
standard
substances having a known or determined "range" of values
_________ - values stated by manufacturer
___________ - values not given, determined by user - Answers - Control
Assayed
Unassayed
____________________________ range of values within which control results must
fall.
Usually established by analyzing the control 20 times and calculating the mean,
standard deviation, and ± 2SD - Answers - Confidence Interval (control range)
_____ materials analyzed the same as patient samples (unknown conc.)
*Used to ensure reliability of analytical* activities - Answers - QC
''
For QC, ___________________ must be the same as sample - Answers - Matrix
A 1,3S rule violation or R4s (*everything else systematic error*) - Answers - Random
Error
Outliers - Answers - QC results that fall outside acceptable range (system is termed out
of control) may or may not include outlier value in QC statistics
ANSWERS
__________________ describes how close a test result is to the true value. - Answers -
Accuracy
__________________ describes how close the test results are to one another when
*repeated analyses* of the same material are performed. - Answers - Precision
______________________ is a process that monitors the accuracy and reproducibility
of results through the use of control specimens. - Answers - Quality control
________________________________ have an EXACT known concentration, purity,
or quality of the substance (analyte) being measured, used to standardize the assay
sometimes called ___________________ (NOT A CONTROL) - Answers - Standards
(Calibrators)
standard
substances having a known or determined "range" of values
_________ - values stated by manufacturer
___________ - values not given, determined by user - Answers - Control
Assayed
Unassayed
____________________________ range of values within which control results must
fall.
Usually established by analyzing the control 20 times and calculating the mean,
standard deviation, and ± 2SD - Answers - Confidence Interval (control range)
_____ materials analyzed the same as patient samples (unknown conc.)
*Used to ensure reliability of analytical* activities - Answers - QC
''
For QC, ___________________ must be the same as sample - Answers - Matrix
A 1,3S rule violation or R4s (*everything else systematic error*) - Answers - Random
Error
Outliers - Answers - QC results that fall outside acceptable range (system is termed out
of control) may or may not include outlier value in QC statistics
