security returns	if state occurs
state of economy	probability of state of economy	Roll	Ross
Bust	0.5	-19%	12%
Boom	0.5	19%	5%

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 decimals): (Negative values should be indicated by a minus sign. Do not round intermediate calculations. Round your Standard deviation answers to 2 decimal places and other answers to 4 decimal places. Omit the "%" sign in your response.)

State of Economy	probability of state of economy	Return deviation from expected return	Squared return deviation	Product
Roll
Bust	0.50
Boom	0.50
			2 =
Ross
Bust	0.50
Boom	0.50
			2 =

	Standard deviation
Roll	%
Ross	%