(
). As another example, two parameters
are needed to specify a line, therefore, there are 2 unknowns. If 10 points
are available to fit the line, the number of degrees of freedom is 
(
).Degrees of freedom refer to the number of independent observations made
in excess of the unknowns. If there are 3 unknowns and 7 independent observations
are taken then the number of degrees of freedom is (). As another example, two parameters
are needed to specify a line, therefore, there are 2 unknowns. If 10 points
are available to fit the line, the number of degrees of freedom is ().
See Also:
Unbiased and Biased Estimators
