Question

question 2 (multiple choice worth 2 points) (rs 011h mc) ophthalmology students compared two types of detached retina surgery to determine if patients were able to regain vision. they studied laser surgery and freezing treatment. identify the response and explanatory variables. the response variable is the type of retina surgery, and the explanatory variable is the amount of vision the patients obtained after surgery. the response variable is the amount of vision the patients obtained after surgery, and the explanatory variable is the type of retina surgery. the response variable is laser surgery, and the explanatory variable is freezing treatment. the response variable is freezing treatment, and the explanatory variable is the amount of vision the patients obtained after surgery.

Explanation:

In this study, the explanatory variable is the factor being tested (type of surgery: laser vs freezing), and the response variable is the outcome being measured (amount of vision regained after surgery). The explanatory variable causes a change in the response variable.

Answer:

The response variable is the amount of vision the patients obtained after surgery, and the explanatory variable is the type of retina surgery.