Which of the following practices is inappropriate when establishing quality controls ranges?
A) Exclusion of any quality control results greater than ±2 standard deviation from the mean
B) Compare your data to the manufacturer of the quality control material.
C) Gather quality control data for a long period of time if necessary.
D) Using control results from all shifts on which the assay is performed

Question

Quizplus · Accepted Answer

Excluding any quality control results greater than ±2 standard deviation from the mean is inappropriate because it can lead to a biased estimation of the mean and standard deviation, potentially masking issues with assay performance. Quality control ranges should be established based on a representative sample of data, including outliers, to accurately reflect the performance of the assay.

Which of the Following Practices Is Inappropriate When Establishing Quality