Hi
I am conducting 2-sample Kolmogorov Smirnov tests for my Masters project to
determine if two independant tree populations have the same size-class
distribution or not. The trees have been placed into size-class categories
based on their basal diameters. Once I started running the stats on my data,
I got confused with the results. Just to show an example of what I was
testing I ran stats comparing population1 to population 2. and then
comparing population 3 to population 2.
Popn1 Popn2 Popn3 880 769 0 34 40 19 10 24 19 2 2 8 2 2 36 0 0 0
Common sense tells me that P1 and P2 are similar and that P3 and P2 are
dissimilar. However, for the P1 versus P2 test I am getting p-value of 1
(saying they are strongly similar -what I expected) and for the P3 versus P2
test, a p-value of 0.9307 (saying they are strongly similar, but slightly
less similar than the other test- not what I expected at all). However,
common sense tells me that P3 and P2 are not similar at all and that I
should be expecting a far lower p-value for the test comparing P3 and P2.
Any help would be greatly appreciated
Thanks
Lisa
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