5. A random sample of 15 students was selected for an experiment with curriculum materials prepared by the department as an experimental variable. Before the curriculum materials were used, the 15 students were given a test and after the use of the curriculum materials, there were the same test. The following scores were observed: 1 2 3 4 5 6 7 89 10 No. 11 12 13 14 15 Before 76 80 91 82 86 68 70 85 83 88 92 98 88 82 84 After 85 89 94 90 95 77 82 92 83 84 98 100 92 86 93 Did the implementation and use of curriculum materials improve their learning of the subject matter?

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