¥How were the 70 trees in
NOAMER 1400 selected?
1.How representative are these trees of the population of
trees that grew from 1400-2000? In terms of
geography, altitude, and type.
2.If these trees seemed ÒinterestingÓ to various
individuals who took the core samples,
should one believe those trees can/should be
treated as a Òrandom sampleÓ? Are there biases
in the selection of these trees?
3.Presumably many trees could not be sampled because they had died or been harvested. What is the effect of this ÒcensoringÓ on the data (and the analysis)?
4.What is the correlation between temperature and tree ring
growth?
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