Professor todd decides to test her hypothesis that eating chocolate prior to exams increases students' test scores. she randomly assigns students to two groups at the beginning of the semester. one group receives a bar of chocolate before each test, while the other group receives another type of candy. she compares their scores at the end of the year, and finds that the students who ate the chocolate scored an average of ten points higher on their exams. what is a fair conclusion that can be drawn from this experiment?

The answer is "Eating chocolate causes students’ test scores to increase".

An experiment regarding experiment to bunches enables us to decide cause and effect.

Random assignment of members guarantees that any contrasts between and inside the gatherings are not efficient at the start of the test.  

While there are distinctive approaches to take a gander at connections amongst variables, and examination is the most ideal approach to get a reasonable thought if there is a cause-and-effect connection between at least two variables.