Editing Contour line (section)

=== Statistics ===
In statistics, isodensity lines <ref name="Fernandez 2011">{{cite journal |vauthors= Fernández, Antonio|date=2011 |title= A Generalized Regression Methodology for Bivariate Heteroscedastic Data|journal= Communications in Statistics – Theory and Methods|volume= 40|issue=4 |pages= 598–621 |doi=10.1080/03610920903444011 |s2cid=55887263 |url= http://oa.upm.es/12253/1/INVE_MEM_2011_92717.pdf}}</ref> or isodensanes are lines that join points with the same value of a [[probability density]]. Isodensanes are used to display [[bivariate distribution]]s. For example, for a bivariate [[elliptical distribution]] the isodensity lines are [[ellipse]]s.