ESS210B
Prof. Jin-Yi Yu
How to
Determine DF?
qThe number
of degree of freedom
= (the
number of original observations) – (the number of parameters estimated from the observation)
qFor
example, the number of degree of freedom for a variance is N-1, where N is the number of the observations.
qIt is
because we need to estimate the mean (a parameter) from the observations, in order to calculate the variance.
