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March 25, 2017

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A large group of students has taken a college entrance exam. The scores on the exam are such that the mean = 52 and the standard deviation = 11

Find the probability that a student, selected at random, earned a score lower than 63.

  • statistics - ,

    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.

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