A researcher hypothesizes that eating before class will improve exam performance, regardless of the time of day the class is held. She teaches a history lesson to students who did or did not eat prior to a class (eating) held at 8:00 a. m., 12:00 p. m., or 4:00 p. m. (time of day). Based on the hypothesis stated here, what kind of effect does the researcher expect to observe?

main effect of eating

Explanation:

Hypothesis: In research methods, the hypothesis is described as a "proposed explanation" for a specific phenomenon. It requires the scientific method to prove it or test it. Different scientists, researcher, or experimenter generally base their hypotheses on the former observations that can't be explained satisfactorily with already available theories.

It is referred to as an explanation that a researcher tests or measures via experimentation or study.

As per the question, the researcher expects to observe the main effect of eating.

its kind of blury sorry