I will have a set of instructions on how to create & view a watershed boundary, a point coverage, contours of the point cover, Thiessen polygons, and intersection coverages using both ArcView and ARC/INFO.  However, I'm afraid I am running out of time.  I am not sure I will be able to find out how to obtain weighted means for your data in ArcView or ARC/INFO.  I will check in with you today around 4:00pm to let you know the status of the lab.  When completed I will email you a copy.
 
I apologize for the delay--I have had many more thngs to do this week than was anticipated.
 
Dan