A Phlebotomist Is Performing Point-Of-Care (POC) Glucose Measurements on Patients

question 18

Multiple Choice

A phlebotomist is performing point-of-care (POC) glucose measurements on patients in the outpatient clinic using a glucose meter according to established procedures. He or she notices that one patient's glucose value is very high at 327 mg/dL. Lab policy requires that POC glucoses greater than 200 mg/DL be verified by a glucose performed in the central laboratory on an instrument. However, the phlebotomist forgets this requirement in his or her haste to phone the result to the patient's physician as soon as possible. This action has introduced which type of variable into the test system?

• A) Examination
• B) Postexamination
• C) Preexamination
• D) Examination and postexamination

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Definitions:

Alpha

A threshold value used in hypothesis testing that represents the level of significance, typically set at 0.05 or 0.01, indicating the probability of wrongly rejecting the null hypothesis.

Chi-square Statistic

A statistical measure used to determine if there is a significant relationship between two categorical variables.

Degrees of Freedom

The number of independent values or quantities that can vary in the calculation of a statistic.

Critical Value

A threshold in hypothesis testing that defines the boundary between the region where the null hypothesis is rejected and where it is not.