0 Replies Latest reply: Dec 15, 2011 4:48 AM by Peter Terstall RSS

    Standard Deviation

      I need help with the folowing problem


      I have a file with sales quantity per week.   I now need to calculate the standard deviation where the sales quantity is grouped by a number of weeks. The number of weeks is entered in to a input field by the user.


      So i have week 1 10 pcs  week 2 20 pcs week 3 5 pcs  week 4 25 pcs.  If the user inputs 2 weeks my calculation of the standard deviation would be like  stdev(30,30)


      Peter