Table 8.1 Year-by-Year Returns, 1950-1999 Note: Sources for annual retums are the Center for Research on Security Prices, Standard \&Poor's 500 index, Russell 2000 index, and Solomon-Smith Bamey U.S. Treasury bill index. Variance and standard deviation. Calculate the variance and the standard deviation of U.S. Treasury bills, long-term government bonds, and small-company stocks for 1950 to 1959 , 1960 to 1969,1970 to 1979, and 1980 to 1989 from Table 8.1. Which had the highest variance? Which had the lowest variance? Click on the Spreadsheet Learning Aid to see Table 8.1-Year-by-Year Returns, 1950-1999. Hint: Make sure to round all intermediate calculations to at least seven (7) decimal places. The input instructions, phrases in parenthesis after each answer box, only apply for the answers you will type. What is the variance of U.S. Treasury bills for 1950 to 1959,1960 to 1969,1970 to 1979 , and 1980 to 1989? The variance of U.S. Treasury bills for 1950 to 1959 is \%. (Round to five decimal places.) Table 8.1 Year-by-Year Returns, 1950-1999 Note: Sources for annual retums are the Center for Research on Security Prices, Standard \&Poor's 500 index, Russell 2000 index, and Solomon-Smith Bamey U.S. Treasury bill index. Variance and standard deviation. Calculate the variance and the standard deviation of U.S. Treasury bills, long-term government bonds, and small-company stocks for 1950 to 1959 , 1960 to 1969,1970 to 1979, and 1980 to 1989 from Table 8.1. Which had the highest variance? Which had the lowest variance? Click on the Spreadsheet Learning Aid to see Table 8.1-Year-by-Year Returns, 1950-1999. Hint: Make sure to round all intermediate calculations to at least seven (7) decimal places. The input instructions, phrases in parenthesis after each answer box, only apply for the answers you will type. What is the variance of U.S. Treasury bills for 1950 to 1959,1960 to 1969,1970 to 1979 , and 1980 to 1989? The variance of U.S. Treasury bills for 1950 to 1959 is \%. (Round to five decimal places.)