Hi, To a single Bernoulli Trial (one car leaving the park goes left or right)if I "preview" go to right and this happens trial out is success .But what p probability I can give to this? I imagine the correct way is tally the frequencies at ,eg, 10 cars go right and then do my "only trial", with some p of shure. This is p is achieved After some number of Bernoulii trials to be used Before one or more future trials? Thank you in advance for any comments. Regards Rafael ================================================================= Instructions for joining and leaving this list and remarks about the problem of INAPPROPRIATE MESSAGES are available at http://jse.stat.ncsu.edu/ =================================================================