Refer to Data Set 6 in Appendix B. Use the paired data consisting of the return on invested capital (%) and return on equity (%) for the top 50 companies. If either value is not available (n.a.) for a company, omit that company from the analysis. Using a 0.05 level of significance, test the claim that for top companies, the median difference in these two types of financial return is 0. Based on these results for top companies, do return on invested capital and return on equity appear to be about the same?