Astudy is conducted to determine how low blood glucose levels affect attention. this type of study would be considered

This type of study would be considered a hypothesis,
 A hypothesis is a tentative statement about the relationship between two or more variables. It is a specific, testable prediction about what you expect to happen in a study. For example in the above question; we can say the study is designed to asses how low blood glucose levels affect attention. In scientific methods, a hypothesis represents what the researchers think will happen in an experiment.