Quality control includes which of the following?
1. Analyzing unknown samples and submitting to the sponsoring organization
2. Assessing control sample measurements against defined limits
3. Addressing problems through corrective actions
4. Identifying problems
a. 1 and 2 c. 2, 3, and 4
b. 3 and 4 d. 1, 2, 3, and 4
ANS: C
Quality control is the system that entails the analysis of control samples and assessment of the measurements against defined limits, identification of problems, and specification of corrective actions. The analysis of unknown samples and submitting the analysis results to a sponsoring or-ganization is known as proficiency testing.
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