A researcher is interested in measuring the benets of undergoing cosmetic surgery. He conducted an experiment where he measured depression (as measured by the BDI) among individuals who received plastic surgery and a control group that was on a wait list. Below are the results of a one-way AN OVA. Std. 95% Condence Interval for Deviation Error Mean Lower Upper Waiting List 1.322 22.48 27.71 Cosmetic 1.197 18.43 23.16 Surgery Total . . .905 21.27 24.84 Test of Homogeneity of Variances Beck Depression Inventory ANOVA Test of Homogeneity of Variances Beck Depression Inventory ANOVA Beck Depression Inventory Between Groups 1274.101 1 .017 Within Groups 60876.083 274 Total 62150.185 a. Was the assumption of homogeneity of variance met? b. Calculate MS between c. Calculate MS within d. Calculate total degrees of freedom e. Calculate the F-ratio f. Was there a significant difference between groups? Do we reject or fail to reject the null hypothesis? The null hypothesis