A few more numbers to numb your mind or make your day! Correlation Coeffieients at 95% Level: Data compared to Kit 8302 as base line: Kit 8299: 0.972 Kit 8313: 0.997 Kit 8336: 0.999 Kit 8439: 0.990 Kit 8456: 0.995 Kit 8821: 0.976 These numbers represent the chance ( convert to % ) that the DYS #s fall on the same straight line as Kit 8302. Data compared to Kit 8299 as base line: Kit 8821: 0.982 Kit 8439: 0.954 Represents chance that DYS #s fall on same straight line as Kit 8299. These are great correlations, no matter how you look at them. There is certainly a relationship here. How far back is up for grabs- - - depending on a set of assumptions. A good source of info is available from: <A HREF="http://nitro.biosci.arizona.edu/ftdna/models.html">http://nitro.biosci.arizona.edu/ftdna/models.html</A> or <A HREF="http://nitro.biosci.arizona.edu/ftdna/quick.html">http://nitro.biosci.arizona.edu/ftdna/quick.html</A> or <A HREF="http:blairgenealogy.com/dna/dna101.html">http:blairgenealogy.com/dna/dna101.html</A> w. w.