ANOVA or ANCOVA - how to standardize for body size


New Member
Hi everyone,

I have a set of data for several species of animals that range in size. Is it appropriate for me to standardize my dependent variables by dividing them by a common body metric (ex: water content/body length) to essentially form a new dependent variable, with species as my independent variable or do I have to run an ANCOVA with water content as my dependent, species my independent and body length as the covariate?

Any help is greatly appreciated! Thanks!


Super Moderator
By creating a new varaible, I believe you will lose information. If this was my data, Id be fitting an ANCOVA model as you noted.