> If the number seems too large, perhaps it is. >(snip) > These kinds of problems are generally taught in upper level statistics > classes at universities, No kidding? For me this was part of the exam of the school that preceded university (VWO in my country, corresponds to your highschool?). I *loved* this subject. Wouter van Ooijen -- ------------------------------------------- Van Ooijen Technische Informatica: www.voti.nl consultancy, development, PICmicro products docent Hogeschool van Utrecht: www.voti.nl/hvu -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist