A study lооked аt whether а brief diet interventiоn might improve depression symptoms. In the study, 75 college-аge students with elevated depression symptoms and relatively poor diet habits were randomly assigned to either a healthy diet group or a control group. Depression levels were measured at the beginning of the experiment and then again three weeks later. The response variable is the reduction in depression level (as measured by the researchers) at the end of the study. Larger numbers mean more improvement in depression symptoms. The average change in the healthy diet group was 7.87 units. The average change in the control group was 0.76 units. Suppose the p-value was 0.321. Give the conclusion of the test . Assume an alpha value of 0.05.