A recent study reports that elementary school students in second grade who were given a nutritious breakfast had higher test scores in math than students who received less nutritional breakfast. In the study, the students were randomly assigned to the nutritional groups and were either given more nutritional or less nutritional food in school by the research team. The academic performance was assessed later by how many math problems they solved correctly out of 10. For this study:

1) What is the independent variable?

2) What the IV scale of measurement?

3) What is the Dependent variable?

4) What the DV scale of measurement?

5) Was this a true experiment? Why?