Bias (statistics)

Statistical bias is a feature of a statistical technique or of its results whereby the expected value of the results differs from the true underlying quantitative parameter being estimated.


A statistic is biased if it is calculated in such a way that it is systematically different from the population parameter of interest. The following lists some types of biases, which can overlap.

See also


  1. Rothman, K.J. et al. (2008) Modern Epidemiology (Lippincott Williams & Wilkins) pp.134-137.
  2. National Council on Measurement in Education
  3. Higgins, Julian PT; Green, Sally (March 2011). Cochrane Handbook for Systematic Reviews of Interventions. The Cochrane Collaboration.
This article is issued from Wikipedia - version of the 11/22/2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.