Standard deviation. Calculate the standard deviation of U.S. Treasury bills, long-term govemment bonds, and large-company stocks for 1989 to 1998 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 standard deviation of U.S. Treasury bills for 1989 to 1998? \% (Round to three decimal places.) 57