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A chemical solution of a known concentration that can be used as a reference or calibration substance is:

When a 22s rule is violated, is it caused by systematic or random error? 

Which of the following values is altered by recent food ingestion?

A shift in control results is a:

Which of the following is required in a CAP accreditation, but not required as part of CLIA regulations? 

Explain the R4s Westgard QC rule.

Describe the action necessary for the 5th run of QC data for Hemoglobin controls: Mean Level I Hemoglobin = 5.7 g/dLStandard deviation = .6 Mean Level II Hemoglobin = 12.8 g/dLStandard Deviation = .4 Run (consecutive) Hemoglobin Level I control Hemoglobin Level II control 1 6.3 12.3 2 6.7 12.1 3 5.4 13.0 4 4.4 11.9 5 4.2 12.3 6 5.9 12.8 7 5.8 12.0 8 4.9 12.7

What is the reference range if the mean calcium on 300 samples is 9.4 mg/dL   and the Standard deviation is 0.85?

Explain why hemolysis will affect test results?  Name two tests which are altered by hemolysis. (3 points)

How do we calculate the Coefficient of Variation?