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The past five monthly returns for Kohl's are 3.72 percent, 4.07 percent, -1.86 percent, 9.34 percent, and -2.74 percent. Compute the standard deviation of Kohls' monthly returns. (Do not round intermediate calculations and round your final answer to 2 decimal places.) Return, Return2 Return3 Return4 Returns 37 2% 4.07% -1.86% 9.34% -274% Standard deviation