Answer all the questions below for each link/study and answer it around 2- 3 sentences for each number question.

In total there will be 4 paragraphs , 1 paragraph for each link/study.

Here are the studies links:

https://www.youtube.com/watch?v=mLASrOujkGw

https://www.youtube.com/watch?v=g-w6XlAXhPE

https://www.youtube.com/watch?v=I3F8zCS3ccU

https://www.youtube.com/watch?v=4ksrXwVffoc

1. What is the argument of the study?
2. What is the independent variable? Why is it the independent variable?
3. What is the dependent variable? Why is it the independent variable?
4. What confounding variable(s) has been ignored, and how might that affect the conclusions? In other words, for each study, identifies at least one likely confounding variable and explains how it is related to both the independent and dependent variables.
5. Explain how each confounding variable might distort conclusions?