9. In 1951 the Treasury Department and the Federal Reserve System (the Fed)

came to an agreement known as the "Accord," whereby the Fed was no longer obligated to peg interest rates on Treasury securities. What were the average returns and standard deviations on Treasury bills for the ten-year periods from 1942 to 1951 and from 1952 to 1961? From these data, does it appear that the Fed did indeed stop pegging interest rates? (See endnote 2 for the formula for standard deviation.)