Mon 12 Oct, 2009 02:48 pm - A contest is held outside to see whose model airplane flies farthest. How can I set up a table to record important obseravations? (view)
Mon 12 Oct, 2009 02:14 pm - You find more hair shed by light-colored dog than by a dark-colored dog. what, if any, bias might account for your observation? (view)
