Source: thermometer;PublicDomain:http://www.morguefile.com/archive/display/50905 eye;PublicDomain:http://www.morguefile.com/archive/display/31874 ruler;PublicDomain:http://www.morguefile.com/archive/display/102135
A variable that we believe is predictive of something else. An increase in this variable will correspond to an increase or decrease in some other variable.
A variable that is affected by the explanatory variable.
Any attribute or number that can be measured about individuals in a study.
Any variable which we need to know about in the context of a study.