Is there a difference in the variation of the yield of five-year certificates of deposit (CDs) in different cities? The file Five Year CD Rate contains the yields for a five-year CD for nine banks in New York and nine banks in Los Angeles, as of August 6, 2012. (Data extracted from www .Bankrate.com, August 6, 2012.) At the 0.05 level of significance, is there evidence of a difference in the variance of the yield of five-year CDs in the two cities? Assume that the population yields are normally distributed.