just short answered

A sample of non-English majors at a selected college was used in a study to see if the student retained more from reading a 19th-century novel or by watching it in DVD form. Each student was assigned one novel to read and a different one to watch, and then they were given a 20-point written quiz on each novel. The test results are shown below. Can it be concluded that the book scores are different from the DVD scores? Let the difference d = Book - DVD.

Student Book DVD 90 85 80 72 90 80 75 80 80 70 90 75 84 80