The dependent variable in this given study is; Stamina of the patients
A dependent variable is a variable that depends on the outcome of another variable whereas an independent variable doesn't depend on the outcome of another measured variable.
Now, in the question, we are told that the patients are selected randomly in a high-exercise or low-exercise training program for eight weeks.
This means that the independent variable is the exercise program as it doesn't depend on another measured variable.
However, the stamina being measured from the exercise program is the dependent variable as it depends on the exercise program results.
Read more about dependent and independent variables at; https://brainly.com/question/11969442