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4) With the move to on-line classes, the Psychology Department became interested in whether students prefer synchronous or asynchronous courses. To examine this, the Department commissioned a small study involving 19 students, 10 who took Cognitive Psychology synchronously and 9 who took the same course asynchronously. Each student was asked to rate on a scale of l to 7 how much they enjoyed the course. The data are shown below. chronous s chronous 4 3 6 2 5 5 7 4 7 2 6 4 5 3 6 2 5 1 6 a) Determine the most appropriate test for comparing the data of these groups? (or = .05) (6 marks) b) Test whether students prefer synchronous courses over asynchronous courses. (or = .05) (6 marks)