A therapist would like to evaluate the effectiveness of a procedure for treating depression.A sample of n = 16 depressed clients is obtained and each person's level of depression is measured using a standardized questionnaire before they begin the therapy program.Two weeks after therapy, each client's level of depression is measured again.For this sample, the average level of depression dropped by MD = 6.8 points following therapy.The difference scores had a variance of s2 = 64.Are the results sufficient to conclude that the therapy was effective?Report your findings (t, df, SE, p), including effect size (Cohen's d, even if no significant effect) in a sentence or two