Jim is retaking statistics as part of his doctoral program. On his final in his MA program, he received a 225. The class mean of 230 and standard deviation of 12 were published. Jim just received his current stats final grade of 260, where the class mean is 245 and standard deviation is 17. How do Jim's scores compare? Which was better? Provide the IV, DV, Covariate, and best method of analysis