Health care professionals are required to follow certain principles to ensure that nosocomial infections do not occur in the health care facility. Which of the following contributes to infections in health care settings?
A) Health professionals with short hair
B) Health professionals donning artificial nails
C) Health professionals with leather footwear
D) Health professionals with earrings
B
Feedback:
In order to ensure that nosocomial infections do not occur at the health care facility, nurses are prohibited from wearing artificial nails. Health professionals with short hair, earrings, or leather footwear do not contribute inordinately to infections.
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The statistical procedure that controls for the influence of extraneous variables on the dependent variable is:
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The amount of medication in this syringe is ________ (use correct notation). 
What will be an ideal response?