There are a very large number of mutual funds from which an investor can choose. Each mutual fund has its own mix of different types of investments. The data BestFunds1 present the one-year return and the three-year annualized return for the 10 best mutual funds, according to the U.S. News & World Report score for short-term bond funds and long-term bond funds. (Data extracted from money.usnews.com/ mutual-funds/rankings.) Analyze the data and determine whether any differences exist between short-term and long-term bond funds. (Use the 0.05 level of significance.)