Question

please explain what does this question mean and give an example.

" Provide information on key variables of interest. Refer back to the conceptualization section of CH 6 lecture "Defining and Measuring Concepts"

Answer 1

• Variable of interest (in an experimental study) is defined as a changing quantity that is measured. One or more of these variables, referred to as the factors of the study, are controlled so that data may be obtained about how the factors influence another variable referred to as the response variable, or simply the response.
• Example:- Consider an experiment, designed to determine the effect of three different exercise programs on the cholesterol level of patients with elevated cholesterol. Each patient is referred to as an experimental unit, the response variable is the cholesterol level of the patient at the completion of the program, and the exercise program is the factor whose effect on cholesterol level is being investigated. Each of the three exercise programs is referred to as a treatment.