This report is based on sampled data: i have often seen this message in my google analytic a/c, can any one explain why this message appears and how can get rid with that.
It probably means there isn't enough data to produce a statistically valid report. that is why a sampled data is used.
Its basically the other way around. http://www.google.com/support/googleanalytics/bin/answer.py?hl=en&answer=66084 Are you looking at reports of a high traffic site?