A statistics tutor wants to assess whether her remedial tutoring has been effective for her five students. Using a pre-post design, she records the following grades for a group of students prior to and after receiving her tutoring.

Before After 2.4 3.0 2.5 2.8 3.0 3.5 2.9 3.1 2.7 3.5

Test whether or not her tutoring is effective at 0.05 alpha. State the value of the test statistic and the to retain or reject the null hypothesis.