researcher tested how coffee at breakfast might cause students to have better test scores, compared to milk and juice. She randomly selects 120 freshmen from the university and randomly assigned them to one of the three beverage groups: coffee, milk, and juice. She asked participants not to have breakfast on the test day before coming to the test at 9 am. Before the test, she gave each participant the same food for breakfast but with different beverages depending on the conditions they were assigned to. The final average test scores for each condition were as follows (The total points of the test were 100):

Coffee	Milk	Juice
85	75	74

Answer the following question:

1) What type of experimental design did this researcher use?(2 points)

2) Describe the independent variable in this study, including the independent variable and all its conditions? (4 points)

3)Describe the dependent variable(s) in this study, including the dependent variable, and how it is measured?(2 points)

4) Suppose the .95 confidence interval (CI) for the coffee condition is 82 to 88; the CI for the Milk condition is 70 to 77, and the CI for the Juice condition is 69 to .76. What claim would you make based on the estimates of the population means for the three groups in the experiment based on a comparison of these confidence intervals? (4 points)