About: http://webisa.webdatacommons.org/374405852

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	If that is the case, the empirical approach you have described would appear to be the one to use, particularly as the league average number is set by definition to zero, so that the regression equation would reduce to:
http://www.w3.org/ns/prov#wasQuotedFrom	baseballthinkfactory.org