RE: SPC - independent data

[Myron Tribus <mtribus@earthlink.net>]

Dirk van Putten asked for a definition of "autocorrelation".   I used 
my browser to look for that word and it sent me to:

http://www.itl.nist.gov/div898/handbook/eda/section3/eda35c.htm

where I found a very nice definition.

I'm moving and am in the process of throwing away most of my college 
textbooks.  The internet is a better resource and I'm going to save a 
whopping bill for not shipping books!

Myron Tribus