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Message posted by lb on September 21, 2000 at 12:00 AM (ET)
how do you solve for percentiles for a group of data that is given to you for instance the 30th percentile in the group of dqt 20,25,35,55,95
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Re: help
Message posted by JG on September 21, 2000 at 12:00 AM (ET)
There is a certain arbitrariness when you have so little data. Berenson and Levine suggest the following - (5+1)*.3=1.8, round to 2 and thus the second observation is the 30th percentile. See some of the references and links at (129.2.115.68/stats) for further details.
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