A researcher conducts a repeated measures study to evaluate the efficacy of therapy in increasing positive coping skills. The researcher examines positive coping skills before and after therapy with a sample of n = 6 participants. Their scores revealed an average improvement of MD = 15 points. The variance of the difference scores is s2 = 137.09.

Are the results sufficient to conclude that there's a significant difference in positive coping skills before and after therapy? Conduct a hypothesis test, including all steps.