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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

Respuesta :

MathPhys

Answer:

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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