What is the statistical formula of degree of freedom? (where “df” represents degree of freedom and “n” represents the number of values in the sample set)

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1.	What is the statistical formula of degree of freedom? (where “df” represents degree of freedom and “n” represents the number of values in the sample set)
A.	df = n2
B.	df = 2*n
C.	df = n-1
D.	df = (n2)-1
Answer» D. df = (n2)-1

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