Question

question 7
what is the purpose of level ii research?
to define characteristics of interest of groups of patients
to demonstrate the effectiveness of an intervention or treatment
to describe relationships among characteristics or variables
to evaluate the nature of relationships between two variables

Explanation:

Level II research typically involves controlled - trials and is used to demonstrate the effectiveness of an intervention or treatment. Defining characteristics of patient groups is more common in descriptive studies. Describing relationships among characteristics or variables and evaluating the nature of relationships between two variables are often done in correlational or analytical research but not the main purpose of Level II research.

Answer:

To demonstrate the effectiveness of an intervention or treatment