** F-ratio**: the ratio of explained to unexplained Mean Squares
(MS), where the numerator is the MS explained by the model and the denominator
is the error MS left unexplained by the model. A
significant effect is indicated by a value of

The *Mean Square* is
the variance measured as variation per degree of freedom.

Doncaster, C. P. & Davey, A. J. H. (2007) *Analysis of Variance and Covariance: How to
Choose and Construct Models for the Life Sciences*. Cambridge: Cambridge
University Press.

http://www.southampton.ac.uk/~cpd/anovas/datasets/