Bias
From HandWiki
A physical quantity 
is measured using the estimator S, which is a function of the elements 
of a sample, 
. The difference between the expectation value of the estimator, E(S), and the true value of the physical quantity is the bias of the estimator: 
. The estimator is unbiased if 
. For the relation between bias and variance of an estimator, see Bishop95.
 |
