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Unformatted text preview: When asked about “what score,” the problem is asking for you to solve for X • Middle 80%  The distribution is symmetrical, so 40% on each side • More extreme refers to the two tails! • What scores cut off the most extreme .05? o Then you divide this given value by two in order to get BOTH TAILS! • Bottom 80% refers to 80% measured from the left (negative side) o Bottom 80% also refers to the 80% tile o A score asked in regards to the bottom 80%, the question is the same as asking for a percentile! What score cuts off the bottom x% of the distribution? IS THE SAME AS…. What is the x percentile? • If you are looking for a score that cuts off the top 2.5%, you would look up the area (0.0250) and read the Z score that corresponds to that value. Then you use that Z score in your Zscore formula to solve for X....
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 Fall '07
 KenneyBenson
 Psychology, Standard Deviation, random assignment, 2.5%, Standard score, Optional Exercise, central tendency Variability

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