The chance of rain, shown on a weather app, is given as a percentage. This is a relative frequency, based on real data. The chance of rain, shown on a weather app, is given as a percentage. This is a ...

Introduction Have you ever heard anyone say the chance of something happening is “50–50”? What does that actually mean? This phrase has something to do with probability. Probability tells you how ...

a priori Probability: the probability that we determine from knowing the process by which the uncertain event happens (by logically examining existing information). Certain Event: event that is sure ...