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For a normal distribution with a mean of= 120 and=20 What z-score separates the top 40% (highest scores) from therest? What z-score corresponds to the

  1. For a normal distribution with a mean of= 120 and=20
    1. What z-score separates the top 40% (highest scores) from therest?
    2. What z-score corresponds to the 90thpercentile?
    3. What raw score correspond to the 90thpercentile?
    4. What range of scores would form the middle 60% of thisdistribution?

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