Consider the following returns and states of the economy for

TZ$.$Com.:

What is the standard deviation of TZ$\text{'}$s returns? SET YOUR CALCULATOR TO

FOUR DECIMAL PLACES AND ROUND TO $2$ DECIMAL PLACES AT THE

END. DO NOT ENTER THE $\%.$ FOR EXAMPLE, IF YOUR ANSWER IS

$7\mathrm{.}7011\%$ ENTER IT AS $7\mathrm{.}70.$