Description The issue of evaluating and expressing the uncertainty in measurements, as well as that of testing hypotheses, is reviewed, with particular emphasis on the frontier cases typical of particle physics experiments. Fundamental aspects of probability will be addressed and the applications, solely based on probability theory, will cover several topics of practical interest, including counting experiments, upper/lower bounds, systematic errors,fits and comparison of hypotheses. http://www.roma1.infn.it/~dagos/prob+stat.html Material: Other occasions