Find the Number of Standard Deviations from the Mean

question 78

Multiple Choice

Find the number of standard deviations from the mean. Round your answer to two decimal places.
-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?

• A) 2.40 standard deviations above the mean
• B) 1.20 standard deviations above the mean
• C) 1.20 standard deviations below the mean
• D) 2.40 standard deviations below the mean

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