Mean shift track for survey database

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Mean shift track for survey database

Haijie Ding
Dear Listers,
I got a question on mean shift track. We are doing client project by using
survey and keep accumulating response (we got 6000 responses already). My
first question is if these many data enough to compare our future clients
project with this database? Another question is how can i do significant
test to make sure our database is stable. By saying that i mean even we do
more and more projects, the means for different factors don't change or
change with time. Thanks a lot. if there is anything confusing, please let
me know.

Bests,
Haijie