In a study appearing in the Feb. 16 Early Edition of the Proceedings of the National Academy of Sciences, Harvard researchers demonstrated that simple changes in beak length and depth can explain ...

2 types of variation and how we distinguish between common and special cause variation, along with how to create a rational subgroup. We also cover the equations and constants for the X-bar and R ...

Simple math explains dramatic beak shape variation in Darwin's finches Date: March 1, 2010 Source: Harvard University Summary: In a new study, researchers demonstrate that simple changes in beak ...

In this paper we introduce Joint and Individual Variation Explained (JIVE), a general decomposition of variation for the integrated analysis of such data sets. The decomposition consists of three ...