Question

If you are studying the effects of UV rays on eyesight and you group 10 people together and make them wear sunglasses for 10 weeks and see if their eyesight is affected and then take another group and do not give them sunglasses and test their vision after 10 weeks, what is the variable of interest? (note this is not an ethical study)

Answer 1

Explanation:

Given that we are studying the effects of UV rays on eyesight

Group 10 people together and make them wear sunglasses for 10 weeks and see if their eyesight is affected and then take another group and do not give them sunglasses and test their vision after 10 weeks

Here we want to study the effect of UV rays on eyesight.

Thus the variable of interest is the eyesight and it is to be studied whether wearing sunglasses really has influence on improved eye sights.