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Assume the amount of time it takes to complete a QMB homework assignment follows the uniform probability distribution between 28 and 58 minutes. What is

Assume the amount of time it takes to complete a QMB homework assignment follows the uniform probability distribution between 28 and 58 minutes. What is the standard deviation of time it takes to complete a QMB homework assignment? 8.66 minutes 12.34 minutes 30 minutes 20 minutes

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