ome students in a college Biology class study alone, while other students study in groups. At the end of the term, their professor compares their grades: students who studied alone had an average grade of top enclose X = 74%. Students who studies in groups had an average grade of top enclose X = 76%. A t-test comparing these two groups shows t(78) = 1.69, p = .21. In a sentence or two, explain what this results means, stating the direction of the effect, if there is one