  These three lectures provide an introduction to the main concepts of
statistical data analysis useful for precision measurements and searches for
new signals in High Energy Physics. The frequentist and Bayesian approaches to
probability theory are introduced and, for both approaches, inference methods
are presented. Hypothesis tests will be discussed, then significance and upper
limit evaluation will be presented with an overview of the modern and most
advanced techniques adopted for data analysis at the Large Hadron Collider.
