Recent research indicates that the effectiveness of antidepressant medication is directly related to the severity of the depression (Khan, Brodhead, Kolts & Brown, 2005).Based on pretreatment depression scores, patients were divided into four groups based on their level of depression.After receiving the antidepressant medication, depression scores were measured again and the amount of improvement was recorded for each patient. The following data are similar to the results of the study.

Recent research indicates that the effectiveness of antidepressant medication is directly related to the severity of the depression (Khan, Brodhead, Kolts & Brown, 2005). Based on pretreatment depression scores, patients were divided into four groups based on their level of depression. After receiving the antidepressant medication, depression scores were measured again and the amount of improvement was recorded for each patient. The following data are similar to the results of the study. Using MS Excel, run the independent-measures single-factor ANOVA for this data: Low High Moderately Moderate Moderate Severe Severe Fill in the summary table for the ANOVA test (Round answers for SS and MS to 3 decimal places.) 5.5. d.f. M.s. Between n a x With in I x x TOTAL u x Also from Excel, obtain the necessary statistics for the ANOVA test: (Report P-value & Fratio accurate to 3 decimal places.) F-ratio: x p-value: a What is your nal conclusion? Use a signicance level ofa = 0.01