Over the past 4 years, the annual rates of return on stock of Brown & Warren Inc. have been -2%, 4%, 14% and 6%, respectively, over the past four years. Compute the standard deviation of these returns.

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The Answer of Over the past 4 years, the annual rates of return on stock of Brown & Warren Inc. have been -2%, 4%, 14% and 6%, respectively, over the past four years. Compute the standard deviation of these returns.

Over the Past 4 Years, the Annual Rates of Return