Royston and Babiker (2002) presented a menu-driven Stata program for the calculation of sample size or power for … Stata 8 under the new name ART. Furthermore, the program has been extended to incorporate noninferiority designs and …

argument about the decline of cinema as an art form. This paper explains why Scorsese is right about the differences that exist …? – is a helpful shortcut to understanding what reducing risk means for those who have control over the industrial art of …

-tests provide valid inferences, "short" model t-tests (ignoring interactions) yield higher power if interactions are zero, but …. After including all interactions, over half their results lose significance. Modest local power improvements over the long … model are possible, but with lower power for most values of the interaction. If interactions are not of interest, leaving …