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Degrees of Freedom 
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#1
Feb1810, 10:27 PM

P: 103

In the Chisquare test, my textbook says that degrees of freedom are the number of independent variables minus one so df = n  1
does this mean that that n is equal to the number of observed values from the equation aka the number of times I've added together the numbers? sum [(OE)^2]/E Is there an instance where it isn't equal to the number of observed values I have? (there's an example in my book (but no answer) with an experiment with observed values of 2 trials of genetic crosses where observed in trial 1 was 0.5 trial 2 was 0.3 but both of these values were measuring the same variable which was heterozygosity. The expected value is 0.8. Does this mean the df = 1? or is it 0 since there is only 1 independent variable?) thanks! 


#2
Feb2310, 06:45 PM

P: 103

df=n1, n means number of the random variables, in this case n is the number of trials. df=n1=21=1



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