Chi-Square Conundrum - Analyzing tree death across 3 areas

S

Statisticale

#11
Hi Brad,

I don't know that the population data would follow a Chi-square distribution - I just chose this as I have counts, & wanted a non-parametric test. The rules of thumb I go for on Chi-square is that expected values should all exceed the value 1, & not less than 20% of cells be less than the value 5. What test may be more appropriate?

Regards.
 
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BradM

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#13

Miner

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#14
You are correct. In many cases different tests such as regression and ANOVA will provide similar results. Each has a distinct advantage over the other.

Chi-square has an advantage in that it is extremely flexible and relatively easy. Its disadvantage is that if you found that a relationship did exist, it will tell you nothing about the nature of the relationship. You must perform other tests to discover that.
 
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