SD = sqrt{<x^2>-<x>^2}. Take sqrt of 64. If you reply to this email, your message will be added to the discussion below: http://discussion-forum.2150183.n2.nabble.com/DSE-2009-Paper-Discussion-tp7590860p7603052.html To unsubscribe from DSE 2009 Paper Discussion, click here. NAML