First of all, does anyone know why it is customary to multiply 1.5*IQR in order to find outliers? In particular, why is it 1.5 and not, for example, 2?
Secondly, is there anyone else out there besides me who will be teaching AP Stats as a one semester course (at the high school level)? If so, perhaps we could discuss texts, syllabus, etc. I am a bit panicked due to the time constraints of a one semester course, even though it was recommended by the College Board.