The number of hours per day a college student spends on homework has a mean of 6 hours and a standard deviation of 1.25 hours. Yesterday she spent 3 hours on homework. How many standard deviations from the mean is that? Round your answer to two decimal places. A. 1.20 standard deviations above the mean OB. 2.40 standard deviations below the mean OC. 2.40 standard deviations above the mean OD. 1.20 standard deviations below the mean

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