Calculate the standard deviations for Roll and Ross by filling in the following table (verify your answer using returns expressed in percentages as well as decimal

		Security Returns If State Occurs
State of	Probability of
Economy	State of Economy	Roll		Ross
Bust	.60	-14	%	15	%
Boom	.40	32		5

State of Economy	Probability of State of Economy	Return Deviation from Expected Return	Squared Return Deviation	Product
Roll
Bust
Boom
			2 =
Ross
Bust
Boom
			2 =

	Standard deviations
Roll	%
Ross	%