If the Standard Deviations of X and Y Are 15

question 7

True/False

If the standard deviations of X and Y are 15.5 and 10.8,respectively,and the covariance of X and Y is 128.8,then the coefficient of correlation r is approximately 0.77.

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Treasury Bills

Short-term government securities issued at a discount from the face value, maturing in one year or less, used as a tool for managing national finance.

U.S. Treasury

The federal department responsible for managing government revenue, issuing currency, and executing fiscal policy in the United States.

Money Market Instrument

Short-term financial instruments that include treasury bills, commercial paper, and certificates of deposit, typically with high liquidity and low risk.

Government Bonds

Bonds issued by the U.S. Department of the Treasury.