because of its widespread needs in different scientific fields, statistics and probability theory have gained great importance and medical students as well as students of other medically related disciplines including nursing need to use them especially in their research projects in undergraduate, graduate and postgraduate schools. this article deals with the question of finding the most effecti...

fairy tales are stories in which metaphysical, paranormal and mysterious events take place and there is no exact time and place; everything is spiritual. the lorestanian story of “daughter of daal” is a tale of the “mythical birth” of a girl from an egg and her being raised by daal (phoenix) in the cave of a caucasus-like mountain. daughter of daal is snared by a hireling hellcat’s deceit, but ...