Which one of the following statements regarding internal quality control (IQC) is INCORRECT?Group of answer choicesOn a Levey-Jenning chart of 5 consecutive runs using the levels 1 and 2 control materials (QC1 and QC2), one QC2 data falls between the 2- and 3-standard deviation (+/-2SD and +/- 3SD) limits. All previous QC values are under the +/- 2SD limits. It is valid to report the patient results in this instance.Repeatedly running the IQC will rectify an analytical issue associated with systematic errorSystematic error has a proportional bias off the target value.A possible cause of random error is due to failure in the automated sampling system.
Question
Which one of the following statements regarding internal quality control (IQC) is INCORRECT?Group of answer choicesOn a Levey-Jenning chart of 5 consecutive runs using the levels 1 and 2 control materials (QC1 and QC2), one QC2 data falls between the 2- and 3-standard deviation (+/-2SD and +/- 3SD) limits. All previous QC values are under the +/- 2SD limits. It is valid to report the patient results in this instance.Repeatedly running the IQC will rectify an analytical issue associated with systematic errorSystematic error has a proportional bias off the target value.A possible cause of random error is due to failure in the automated sampling system.
Solution
The incorrect statement regarding internal quality control (IQC) is: "Repeatedly running the IQC will rectify an analytical issue associated with systematic error".
This is incorrect because systematic errors are consistent, repeatable errors associated with faulty equipment or a flawed experiment design. They cannot be rectified by simply repeating the IQC. Instead, the source of the error needs to be identified and corrected.
Similar Questions
Which one of the following statements concerning internal quality control (IQC) is INCORRECT?Group of answer choicesInternal quality control materials can be pooled from different patient seraWithin-run has a larger extent of imprecision than between-runAt least 20 repeat samples are required to establish control limitsA 4-1s rule is defined as four consecutive values greater than one-standard deviation on the same side of mean
On a Levey-Jennings chart, you identify the Level 1 quality control (QC1) value exceeds the mean by a positive 3-standard deviation (+3SD). The Level 2 quality control (QC2) value exceeds the mean by a negative 3-standard deviation (-3SD) within the same run. What is the most likely cause of this error?Group of answer choicesThe reagent pack has deteriorated and needs to be replaced for a new oneThe lamp in the spectrometric compartment of the analyser has worn off over timeQC1 and QC2 were swappedQC materials were left overnight at room temperature
Which of the following statements is true for an outlier?It is a data point that is below Q1 - 1.5 x IQR or above Q3 + 1.5 x IQR.It is a data point that is below or above Q3 ± 1.5 x IQR.It is a data point that is below or above Q1 ± 1.5 x IQR. It is a data point that is between Q1 + 1.5 x IQR and Q3 - 1.5 x IQR.
Human error is a common cause of internal control failure.True false question.TrueFalse
Mark the resistant measures Q1 Q3 IQR All of the above
Upgrade your grade with Knowee
Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.