many many thx to mike.
ur information help me alot
"Mike Middleton" wrote:
zizi -
RSD ( relative standard deviation)
=100*ABS(STDEV(data)/AVERAGE(data))
or
=ABS(STDEV(data)/AVERAGE(data))
perhaps formatted as percentage
- Mike Middleton
http://www.DecisionToolworks.com
Decision Analysis Add-ins for Excel