Your roommate tells you that he is planning to conduct an observational study for his senior thesis. Which of the following questions would you ask to determine that you understand how observational studies are designed?
Will your research take place in the lab or in the natural environment?

The question you would ask to determine that you understand his observational studies are designed is " Will your research take place in the lab or in the natural environment?

Explanation:

Observational research are studies carried out on site. It involves the observation of your research subject in their natural state or in the field. If your roommate response to the question "will your research takes place in the lab or natural environment" is yes, it will take place in the field or natural environment it simply shows that your roommate has an understanding of what observational research is all about.

rain should be the answer.

you would times this by how many days there are in a year 365*400=$146000