|Feb18-10, 10:27 PM||#1|
Degrees of Freedom
In the Chi-square 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?
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?)
|Feb23-10, 06:45 PM||#2|
df=n-1, n means number of the random variables, in this case n is the number of trials. df=n-1=2-1=1
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