Question: The following data presents tests scores on a Behavioral Vignettes Test for self-help skill teaching for the primary parents of a random sample of families with mentally retarded children before and after a training program.

Before 7 6 10 16 8 13 8 14

After 11 14 16 17 9 15 9 17

Based on this information, can you conclude that the training program is effective? Use a significance level of 0.05. State your assumptions.