Showing posts with label degrees of freedom. Show all posts
Showing posts with label degrees of freedom. Show all posts

Thursday, July 22, 2010

Degrees of Freedom

Degrees of freedom (df) equals the sample size minus the number of estimated parameters. Commonly there is only one estimator - the sample standard deviation.

df=n-k, where k is the # of parameters being estimated.

df=n-1, k = 1 for a single population using an estimated standard deviation