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In a normal distribution with the mean being 500 and the standard deviation being 100, what raw score separates the top 40% of a distribution from the rest?

  • statistics -

    Find the z-score using a z-table that represents the top 40%. Then use z-score formula to find x.

    z = (x - mean)/sd

    mean = 500
    sd = 100

    I hope this will help get you started.

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