Saturday, June 1, 2013

Westgard QC Rules - Three Graphs and 4:1s Rule

Two members posted questions to us about the 4:1s control rule. The first question is about HOW to interpret the 4:1s rule, and the second question is about WHEN to interpret the 4:1s rule.

Let's get to the first question, and look at it graphically. Do you think this is a violation of the 4:1s rule?


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Q&A: Two questions, Three graphs, and the 4:1s rule






















Read more: The Westgard Rules

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1 comment:

  1. RAWDA RUTH SARRAILJune 7, 2013 at 11:35 AM

    Today's Automated, modern instrument encourage the implementation of Wesrgard Rule that is commonly used Levy-Jenning Chart.
    For some test , only single rules are needed and no 4:1s rules need to be used.*

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