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Message: <blockquote data-quote="boxstop7" data-source="post: 518590" data-attributes="member: 8804">To elaborate...If you can get info on mean and SD for other institutions who administered that same test, you can make guesses about the distribution of scores.  If the SD gets bigger at some places than at your facility's, you can safely assume that there are more people scoring toward the extremes (then compare that mean to the mean from your group to see which way the distribution is skewed).  If the SD is smaller at some places than at your facility's, you can usually assume the opposite.  Scores would be more tightly clustered (and comparing that mean to your mean will give you a good indication of how you did comparatively).  In general, the larger the SD the more variance.  The more variance, the more spread out the scores are.  ~Box</blockquote>