Mrs. Johnson teaches American History and wanted to help her students do their best on exams. After failing to find any research on different test formats, she decided to conduct her own research. She flipped a coin for each student in her classes. If the coin landed heads up, the student took a multiple-choice test. If the coin landed tails up, the student received a fill-in-the blank exam. Afterward, Mrs. Johnson compared the averages for the two test formats. First the study above determine if it is an experimental study or an observational study and explain why.

If it is an experimental study identify

a.) variable of interest

b.) treatment

c.) control group

If it is an observational study identify

a.) variable of interest

b.) method of data collection

Your