STATISTICS PROBLEM SOLVING. Solve using megastat in excel worksheet. Interpret final answer.

The pretest and posttest scores of 15 students are shown below. Can we say with 95 % confidence that the intervention strategy used significantly increased the scores.

Pretest Posttest

6 12

7 19

14 13

12 19

10 16

5 19

10 10

9 18

6 9