Mark is conducting a study on the effect of Drug A on the ea…

Mark is conducting a study on the effect of Drug A on the eating behaviors of mice. He will have two groups of mice. One group will get small doses of Drug A and the other group will not get any Drug A. Mark will then measure how many grams of food the mice eat during a day. This is an example of which type of study design?

Samantha is a principal at an elementary school. Three years…

Samantha is a principal at an elementary school. Three years ago, the school implemented a new curriculum to improve state test scores. Samantha gathered data from students during these three years from her school and from a school that did not implement this curriculum. She plans to compare the students state test scores across the three years from her school to the other school. This was an example of which type of study design?