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Posted by on Wednesday, December 9, 2009 at 8:57pm.

For a standard normal curve, find the z-score that separates the bottom 90% from the top 10%.

  • Math-Statistics - , Thursday, December 10, 2009 at 10:34am

    In the back of your statistics text, there is a table labeled something like "areas under the normal distribution." Look for the portion values for the larger or smaller portion to get your Z score.

    I hope this helps.

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