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Magruder Proficiency Test Program
Focus on reports
Individual Lab Performance
Collective Lab Performance
Frank J. Sikora, Division of Regulatory Services University of Kentucky
New Orleans, Feb 2017
Z score 2 + - Robust mean Investigational Allowance + -
32.27
34.27
Control Charts
Collective Lab Performance
Guarantee Investigational Allowance + -
40.0
39.1
40.9
39.4
39.0
Guarantee
40.0
39.4
39.0
Lab Value Sum or Errors + -
S2 samp
S2 prep
+
Inter- and Intra- Lab Variance for Analyte
Sample 15011
Lab 1 Lab 2 Lab 3
Inter- and Intra- Lab Variance for Analyte
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