The Levey-Jenning charts show a two level QC results used on a laboratory test
Evaluate the results on the two charts
State the types of error found
What is the critical analytical range affecting the results showed on the charts?
ANS: Both control results exceed their respective +2s limits, therefore there is a 22s rule violation across materials. A systematic error is most likely occurring and is affecting the results throughout the critical analytical range from at least 200 to 250 mg/dL.Adapted from http://www.westgard.com/
To calculate standard deviation and other math parameters please go to the
following links:
http://www.easycalculation.com/statistics/standard-deviation.phb
http://www.mathsisfun.com/
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