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9 June, 18:21

A college student takes a standardized test and scores a 163. if the mean is 155 and the standard deviation is 7, what is the student's percentile rank? (assume a normal distribution.)

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  1. 9 June, 19:43
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    Z = (score-mean) / SD

    Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability related to the Z score. Multiply by 100.

    Percentile rank is % ≤ any score.
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