The use of background data in the analysis of covariance.
The advantages and disadvantages of using extraneous information about the relationship between variate and covariate in analysis of covariance are examined. The problem is considered both theoretically and by a simulation study. It is found that the usefulness of extraneous information in increasing the precision of analysis of covariance can be assessed using simple formulae.
D000704:Analysis of Variance; D000818:Animals; D001835:Body Weight; D004285:Dogs; D008956:Models, Chemical; D009929:Organ Size; D014116:Toxicology