Question: Scores on a reading comprehension test were recorded for 2 groups of nine students in a remedial reading class. One group read each test passage aloud before answering the comprehension questions, the other read silently. The resulting test scores are given in table 1 below.

Table1: Reading test scores by group (aloud and silent)

Does the data support the researcher’s contention that the mean comprehension score will differ for the two reading methods. Test at the 5% level of significance.