Cencora Corp believes the following probability distribution exists for its stock. What is the standard deviation of the estimated returns? Round your intermediate calculations to at lease $4$ decimal places.

$\backslash$table$[[$State of$,\backslash$table$[[$Probability$],[$of State$]],$Stock's$],[$the$,\backslash$table$[[$Expected$]],],[$Economy$,$Occurring,Return$],[$Boom$,0\mathrm{.}45,37\%$