
 Statistics Glossary  random variables and probability distributions 
  Discrete case : When a die is thrown, each of the possible faces 1, 2, 3, 4, 5, 6 (the xi's) has a probability of 1/6 (the p(xi)'s) of showing. 
  This probability density function (p.d.f.) is a symmetrical, bellshaped curve, centred at its expected value µ. 
  , if its probability density function is constant within a finite interval [a,b], and zero outside this interval (with a less than or equal to b). 
 www.stats.gla.ac.uk /steps/glossary/probability_distributions.html (2101 words) 
