A collection of functions that calculate the log likelihood
(support) for a range of statistical tests. Where possible the likelihood
function and likelihood interval for the observed data are displayed. The
evidential approach used here is based on the book "Likelihood" by A.W.F.
Edwards (1992, ISBN-13 : 978-0801844430), "Statistical Evidence" by R.
Royall (1997, ISBN-13 : 978-0412044113), S.N. Goodman & R. Royall
(2011)