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Statistics

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a normal distribution ha am ean of 80 with a standard deviation of 20. what score separates the highest 15% of the distribution from the rest of the score?

  • Statistics -

    the formula of z-score:
    z=(x-mu)/sigma
    where mu=mean and sigma=standard deviation

    find the z-score equivalent on the table that is equivalent to .85 to substitute back into equation and solve for x

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