While efforts are made to improve tissue quality and control preanalytical variables, pathologists are often confronted with the challenge of molecular analysis of patient samples of unknown quality.

I introduce the notion of a 'control variable' which gives us a way of seeing how mental causation could be an unproblematic case of causation in general, rather than being some sui generis form of ...

Journal of the Royal Statistical Society. Series C (Applied Statistics), Vol. 2, No. 3 (Nov., 1953), pp. 141-151 (11 pages) Quality control is usually regarded in Great Britain as a statistical ...