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23 March, 15:47

students' scores on an anthropology test have a mean of 31 with a standard deviation of 3.5 if rochelle scores 20 on her test, how many standard deviations away from the mean is her score

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  1. 23 March, 17:59
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    3.14

    Step-by-step explanation:

    The difference between her score and the mean is:

    20 - 31 = - 11

    The number of standard deviations that equals is:

    -11 / 3.5 ≈ - 3.14

    Her score is approximately 3.14 standard deviations below the mean.
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